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NOTICE OF INCORPORATION 

United States Legal Document 

J^~ All citizens and residents are hereby advised that 
this is a legally binding document duly incorporated by 
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requirements as hereby detailed within may subject you 
to criminal or civil penalties under the law. Ignorance of 
the law shall not excuse noncompliance and it is the 
responsibility of the citizens to inform themselves as to 
the laws that are enacted in the United States of America 
and in the states and cities contained therein, "^k 

* * 

ASME B31.1 (2007), Code for Pressure Piping, 
Section on Power Piping, 2009 Addenda, as required 
by the laws of the States of Arizona, Alaska, 
Colorado, Illinois, Iowa, Kansas, Michigan, Missouri, 
Minnesota, Nebraska, Nevada, North Dakota, 
Ohio, Oregon, Wisconsin, et . alia. 



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Addenda to 

ASME B31.1-2007 

Power Piping 

ASME Code for Pressure Piping, B31 



AN AMERICAN NATIONAL STANDARD 




Copyright © 2009 by the American Society of Mechanical Engineers. r^ 

No reproduction may be made of this material without written consent of ASME. ^S 



lEIEililillSliilll 



A5807B 



Date of Issuance: August 7, 2009 



ASME is the registered trademark of The American Society of Mechanical Engineers. 

This code or standard was developed under procedures accredited as meeting the criteria for American National 
Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from 
competent and concerned interests have had an opportunity to participate. The proposed code or standard was made 
available for public review and comment that provides an opportunity for additional public input from industry, academia, 
regulatory agencies, and the public-at-iarge. 

ASME does not "approve," "rate," or "endorse" any item, construction, proprietary device, or activity. 

ASME does not take any position with respect to the validity of any patent rights asserted in connection with any 
items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for 
infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expressly 
advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is 
entirely their own responsibility. 

Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as 
government or industry endorsement of this code or standard. 

ASME accepts responsibility for only those interpretations of this document issued in accordance with the established 
ASME procedures and policies, which precludes the issuance of interpretations by individuals. 



No part of this document may be reproduced in any form, 

in an electronic retrieval system or otherwise, 

without the prior written permission of the publisher. 



The American Society of Mechanical Engineers 
Three Park Avenue, New York, NY 10016-5990 



Copyright © 2009 by 

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 

All rights reserved 

Printed in U.S.A. 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Following approval by the B31 Committee and ASME, and after public review, ASME B31.1b-2009 
was approved by the American National Standards Institute on June 3, 2009. 

Addenda to ASME B31. 1-2007 are issued in the form of replacement pages. Revisions, additions, 
and deletions are incorporated directly into the affected pages. It is advisable, however, that this 
page, the Addenda title and copyright pages, and all replaced pages be retained for reference. 



SUMMARY OF CHANGES 

This is the second Addenda to be published to ASME B31.1-2007. 

Replace or insert the pages listed. Changes given below are identified on the pages by a margin 
note, (A09), placed next to the affected area. Revisions introduced in ASME B31. 1-2007 are 
indicated by (07) and revisions in ASME B31.1a-2008 are indicated by (A08). The pages not listed 
are the reverse sides of the listed pages and contain no changes. 

Change 

Updated 



Page 

vii-ix 

1 

2 

2.1 

5, 6 

10-12 

43 

44 

48, 48.1 

62 

62.1, 63 

65 
69 

70 
82 
83-84.1 



Location 

Committee Roster 

100.1.2(A) 

Fig. 100.1.2(A.l) 

Fig. 100.1.2(A.2) 
100.2 

101.5.2 

101.5.3 

121.2(G) 

121.7.2(A) 

122.1.4(A.l) 

124.2(D) 

124.5 

124.6(C) 

Table 126.1 

Table 126.1 

Table 126.1 
Table 129.3.2 
131.4.9 
131.5 
131.6.1(A) 



Third paragraph revised 

Former Fig. 100.1.2(A) redesignated and 
title revised 

Added 

Definitions of capacitor discharge welding 
and creep strength enhanced ferritic steel 
added 

Revised 

Revised 

Revised 

First paragraph revised 

Revised 

Revised 

In-text table revised 

In-text table revised 

ASCE/SEI 7 added 

(1) MSS SP-88 added 

(2) Title of MSS SP-95 revised 

AWS D10.10 added 

Under Material, fourth entry revised 

Added 

Deleted 

Revised 



(c) 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



Page 



87, 88.2 



120, 121 



122, 123 

128, 129 

132, 133 
136, 137 



140, 141 



Location 
131.6.1(C) 
131.6.2 
132.1 

132.3.3 
132.5 
Table 132 



89,90 


132.7 


92 


136.4.1 


102, 103 


Table A-l 


110, 111 


Table A-l 


114, 115 


Table A-2 


118, 119 


Table A-2 



Table A-2 



Table A-2 
Table A-3 

Table A-3 
Table A-3 



Table A-3 



Change 

Revised 

Added 

(1) Existing paragraph designated as 
132.1.1 

(2) Paragraph 132.1.2 added 

Added 

Revised 

P-No. 5B Gr. No. 2 corrected by errata to 
read P-No. 15E, Gr. No. 1 in'first 
column and P-No. 15E in General 
Note (b) 

Revised 

Revised 

Under Electric Resistance Welded Pipe 
and Tube, A 226 deleted 

Under Plate, A 515 Grade 55 deleted 

Under Seamless Pipe and Tube, for A 213 
Grade T91 and A 335 Grade P91, P-No. 
revised 

(1) Under Electric Fusion Welded Pipe — 
Filler Metal Added, for A 691 Grade 
91, P~No. revised 

(2) Under Plate, for A 387 Grade 91, 
P-No. revised 

(1) Under Forgings, for A 336 Grade F91, 
P-No. revised 

(2) Under Wrought Fittings (Seamless 
and Welded), for A 234 Grade WP91, 
P-No. revised 

Under Castings, for A 217 Grade C12A, 
P-No. revised 

Under Seamless Pipe and Tube, 

Austenitic, for A 312 S31254, Specified 
Minimum Tensile, Specified Minimum 
Yield, and all stress values revised 

Under Centrifugally Cast Pipe, 
Austenitic, A 452 deleted 

Under Welded Pipe and Tube — Without 
Filler Metal, Austenitic, for A 312 
S31254, Specified Minimum Tensile, 
Specified Minimum Yield, and all 
stress values revised 

Under Welded Pipe — Filler Metal 
Added, Austenitic, for A 358 S31254, 
Specified Minimum Tensile, Specified 
Minimum Yield, and all stress values 
revised for existing four lines and four 
new lines added 



(d) 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



Page 
144, 145 



162, 163 



164, 165 



166, 167 



168, 169 



186, 187 
188-191 



Location 
Table A-3 



148, 149 


Table A~3 


154, 155 


Table A-3 


160, 161 


Table A-4 



Table A-4 



Table A-4 



Table A-4 



Table A-4 



Table A-4 



Table A~8 
Table A-8 



217 



Mandatory Appendix F 



Change 

Under Plate, Sheet, and Strip, Austenitic, 
for A 240 S31254, Specified Minimum 
Tensile, Specified Minimum Yield, and 
all. stress values revised for existing 
two lines and two new lines added 

Under Fittings (Seamless and Welded), 
Austenitic, A 403 WPS31254 added 

Under Bar, Austenitic, A 479 S31254 
added 

Under Seamless Pipe and Tube, for B 622 
R30556, stress values italicized at 
1,150°F for second line and at 1,200°F 
for both lines 

Under Welded Pipe and Tube, for B 619 
R30556, stress values italicized at 
1,100°F for second line, and at 1,150°F 
and 1,200°F for both lines 

For B 626 R30556, stress values italicized 
at 1,100°F for second line, and at 
1,150°F and 1,200°F for both lines 

Under Plate, Sheet, and Strip, for B 435 
R3Q556, stress values italicized at 
l,150 o F for second line and at 1,200°F 
for both lines 

Under Bars, Rods, Shapes, and Forgings, 
for B 572 R30556, stress values 
italicized at 1,150°F for second line and 
at 1,200°F for both lines 

(1) Under Seamless Fittings, for B 366 
R30556, stress values italicized at 
1,150 C F for second line and at 1,200°F 
for both lines 

(2) Under Welded Fittings, for B 366 
R30556, stress values italicized at 
1,100°F for second line, and at 1,150°F 
and 1,200°F for both lines 

Under Seamless Pipe and Tube, B 622 
R30556 added 

(1) Under Welded Pipe and Tube — 
Without Filler Metal, B 619 R30556 
and B 626 R30556 added 

(2) Plate, Sheet, and Strip heading and 
B 435 R30556 added 

(3) Under Bars, Rods, and Shapes, B 572 
R30556 added 

(4) Under Fittings (Seamless and 
Welded), B 366 R30556 added 

(5) Notes (6) and (7) added 

(1) ASCE/SEI 7 added 



(e) 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



Page 



218 



300 



Location 



Mandatory Appendix F 



219, 219.1 


Mandatory Appendix F 


220 


Mandatory Appendix G 


295-297 


Index 


298 


Index 



Index 



Change 

(2) ASTM A 182/A 1S2M, A 312/ 

A 312M, A 358/ A 358M, and A 403/ 
A 403M revised 

(1) MSS SP-88 and AWS D10.10 added 

(2) ASME B16.1, B16.4, B16.5, B16.ll, 
B16.21, Bl.6.22, B16.25, B16.34, Bl.6.48, 
B36.10M, and B36.19M revised 

ASCE and SEI added 

Second D definition deleted by errata 

capacitor discharge welding added 

miniature electronic boiler and pressure, 
reducing valves revised 

(1) valves, diaphragm added 

(2) valves, pressure regulator revised 



SPECIAL NOTE: 

The interpretations to ASME B31.1 issued between January 1, 2008 and December 31, 2008 follow 
the last page of this Addenda as a separate supplement, Interpretations Volume 44. After the 
Interpretations, a separate supplement, Cases No. 34, follows. 



if) 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31 COMMITTEE 
Code for Pressure Piping 



(A08) 
(A09) 



COMMITTEE OFFICERS 

M. L. Nayyar, Chair 

K. C. Bodenhamer, Vice Choir 

H. Lobo, Secretary 



COMMITTEE PERSONNEL 



J. T. Appleby, ExxonMobil Upstream Research Co. 
Becht IV, Becht Engineering Co. 
E. Beyer, Fluor Enterprises, Inc. 

C. Bodenhamer, Epco, inc. 
J. Campbell, Air Liquide 

S. Chin, TransCanada Pipeline U.S. 

D. Christian, Victaulic 

L Coym, Worley Parsons 
P. Deubler, Fronek Power Systems, LLC 
A. Drake, Spectra Energy Transmission 

D. Flenner, Flenner Engineering Services 
W. Frey, Stress Engineering Service, inc. 

. R. Frikken, Becht Engineering Co. 
A. Grichuk, Fluor Corp. 
. W. Haupt, Pressure Piping Engineering Associates, Inc. 

E. Hayden, Jr., Consultant 

, P. Holbrook, Babcock Power, Inc. 

. A. jolly, Vogt Valves/ Flo wserve Corp. 

. Lobo, The American Society of Mechanical Engineers 



W. J. Mauro, American Electric Power 

j. E. Meyer, Louis Perry & Associates, Inc. 

E. Michalopoulos, Management Authority of West Macedonia 

M. L Nayyar, Sechtei Power Corp. 

R. G. Payne, Alstom Power, inc. 

J. T. Powers, Worley Parsons 

E. H. Rinaca, Dominion Resources, Inc. 
M. J. Rosenfeld, Kiefner & Associates, Inc. 

R. J. Silvia, Process Engineers and Constructors, inc. 
W. J. Sperko, Sperko Engineering Services, Inc. 

F. W, Tatar, FM Global 

K. A. Vilminot, Black & Veatch 

A. L, Watkins, First Energy Corp. 

K. H. Wooten, ConocoPhillips Pipe Line Co. 

A. Soni, Delegate, Engineers India Ltd. 

W. J. Koves, Ex-Officio, UOP LLC 

A. P. Rangus, Ex-Offiao, Bechtel 

R. A. Appleton, Contributing Member, Refrigeration Systems Co. 

C. J. Melo, Alternate, Worley Parsons 



B31.1 POWER PIPING SECTION COMMITTEE 



M. L Nayyar, Chair, Bechtel Power Corp. R. 

P. D. Flenner, Vice Chair, Flenner Engineering Services D. 

C. E. O'Brien, Secretary, The American Society of Mechanical S. 
Engineers W. 

H. A. Ainsworth, Consultant W. 

D. D. Christian, Victaulic D. 
M. J. Conn, Aptech Engineering Services, Inc. R. 

D. H. Creates, Ontario Power Generation, Inc. D. 
G. j. Delude, Pen power K. 
R. P. Deubler, Fronek Power Systems, LLC R. 

A. S. Drake, Constellation Energy Group E. 
S. J. Findlan, Electric Power Research Institute R. 
j. W. Frey, Stress Engineering Service, inc. 

E. C. Goodling, Jr., Worley Parsons ]. 
T. E. Hansen, American Electric Power J. 
R. W. Haupt, Pressure Piping Engineering Associates, Inc. H, 
C. L Henley, Black & Veatch S, 

B. P, Holbrook, Riley Power, Inc. K, 
j. Kaltyadan, Dominion A, 



J. Kennedy, Detroit Edison Co. 
j. Leininger, Worley Parsons 
P. Lscud, Bechtel Power Corp. 
M. Lundy, U.S. Coast Guard 
! . J. ftflauro, American Electric Power 

C. ^loore, Southern Co. Services, Inc. 
G. Payne, Alstom Power, inc. 
W. Rahoi, Metallurgist 
I. Rapkin, FPL 

K. Reamey, Turner industries Group, LLC 
H. Rinaca, Dominion Resources, Inc. 

D. Schueler, Jr., The National Board of Boiler and Pressure 
Vessel Inspectors 
P. Scott, Dominion 
J. Sekely, Welding Services, Inc. 
, R. Simpson, industry and Energy Associates, LLC 

K. Sinha, Lucius Pitkin, Inc. 
, A. Vilminot, Black & Veatch 
, L. Watkins, First Energy Corp. 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



B31.1 SUBGROUP ON DESIGN 



K. A. Vilminot, Chair, Black & Veatch 

D. H. Creates, Ontario Power Generation, inc. 

S. D. Cross, Zachry Engineering 

M. K. Engelkemier, Stanley Consultants, Inc. 

J. W. Goodwin, Southern Co. 

R. W. Haupt, Pressure Piping Engineering Associates, Inc. 

B. P. Holbrook, Riley Power, Inc. 

M. W. Johnson, Reliant Energy 

R. j. Kennedy, Detroit Edison Co. 



W, M. Lundy, U.S. Coast Guard 

D. C Moore, Southern Co. Services, Inc. 

A. D. Nance, Consultant 

R. D. Patel, GE Energy Nuclear 

R. G. Payne, Alstom Power, Inc. 

D. D. Pierce, Puget Sound Naval Shipyard 

K. I. Rapkin, FPL 

T. Sato, Japan Power Engineering and Inspection Corp. 

A, L. Watkfns, First Energy Corp. 

R. B. Wilson, TWD Technologies Ltd. 



B31.1 SUBGROUP ON FABRICATION AND EXAMINATION 



R. K. Reamey, Chair, Turner industries Group, LLC 

R. B. Corbit, Exelon Nuclear 

C. Emslander 

S. J. Findlan, Electric Power Research Institute 

J. W. Frey, Stress Engineering Service, inc. 

S. E. Gingrich, URS Corp. 

j. Hainsworth, The Babcock & Wilcox Co. 



T. E. Hansen, American Electric Power 

D. J, Lesninger, Worley Parsons 
S. P. Licud, Bechtel Power Corp. 
T. Monday, Team industries, Inc. 
J. J. Sekely, Welding Services, Inc. 

E, F. Summers, jr., Babcock & Wilcox Construction Co. 
E. F. Gerwin, Honorary Member 



D. W. Rahoi, Chair, Metallurgist 

M. G. Barkan, Lisega, inc. 

R. P. Deubler, Fronek Power Systems, LLC 

P. J. Dobson, Electricity de France 



B31.1 SUBGROUP ON MATERIALS 



A. S. Drake, Constellation Energy Group 

S. L. McCracken, Electric Power Research Institute 

M. L Nayyar, Bechtel Power Corp, 

W. M. Sherman, Swagelok Co. 



B31.1 SUBGROUP ON OPERATION AND MAINTENANCE 



J. W. Frey, Chair, Stress Engineering Service, Inc. 

C. E. O'Brien, Secretary, The American Society of Mechanical 
Engineers 

M. J. Cohn, Aptech Engineering Services, Inc. 

D. H. Creates, Ontario Power Generation, Inc. 
P. D, Flenner, Flenner Engineering Services 

E. C Goodling, Jr., Worley Parsons 
J. W. Goodwin, Southern Co. 

R. W. Haupt, Pressure Piping Engineering Associates, Inc. 



B. P. Holbrook, Riley Power, Inc. 
ftfl. W. Johnson, Reliant Energy 
R, J. Kennedy, Detroit Edison Co. 

D. C. ftfloore, Southern Co. Services, Inc. 
R. G, Payne, Alstom Power, Inc. 

K. I. Rapkin, FPL 

R. K. Reamey, Turner Industries Group, LLC 

E. H. Rinaca, Dominion Resources, Inc. 
J. P. Scott, Dominion 



B31.1 SUBGROUP ON SPECIAL ASSIGNMENTS 



E. H. Rinaca, Chair, Dominion Resources, Inc. 
M. J. Cohn, Aptech Engineering Services, inc. 
E. C. Goodiing, Jr., Worley Parsons 
J. P. Scott, Dominion 



H, R. Simpson, Industry and Energy Associates, LLC 
S. K. Sinha, Lucius Pitkin, Inc. 
D. A, Yoder, Worley Parsons 



B31 EXECUTIVE COMMITTEE 



N. Lobo, Secretary, The American Society of Mechanical Engineers 

C. Becht IV, Becht Engineering Co. 

K. C. Bodenhamer, Enterprise Products Co. 

D. D. Christian, Victauiic 

J. A. Drake, Spectra Energy Transmission 

P. D. Flenner, Flenner Engineering Services 

D. R. Frikken, Becht Engineering Co. 

R. W. Haupt, Pressure Piping Engineering Associates, Inc. 

L E. Hayden, Jr., Consultant 



B, P. Holbrook, Riley Power, Inc. 

G. A. Jolly, Vogt Valves/Flowserve Corp. 

W. J. Koves, UOP LLC 

E, Michalopoulos, Management Authority of West Macedonia 

M. L Nayyar, Bechtel Power Corp. 

R. G. Payne, Alstom Power, Inc. 

A. P. Rangus, Bechtel 

W. J. Sperko, Sperko Engineering Services, Inc. 

K. H. Wooten, ConocoPhillips Pipe Line Co. 

R. A. Appleton, Contributing Member, Refrigeration Systems Co, 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of AS'ME. 



B31 FABRICATION AND EXAMINATION COMMITTEE 



A. P. Rangus, Chair, Bechtel 

R. J. Horvath, Secretary, The American Society of Mechanical 

Engineers 
j. P. Ellenberger 
R. J. Ferguson, Metallurgist 
D. J. Fetzner, BP Exploration (Alaska), Inc. 
P. D. Flenner, Flenner Engineering Services 
J. W. Frey, Stress Engineering Service, Inc. 
W. W. Lewis, E. I. DuPont 



S. P. Licud, Bechtel Power Corp. 

T. Monday, Team industries, Inc. 

A. D. Nalbandian, Thielsch Engineering, inc. 

R. S. Seals, Consultant 

R. J. Silvia, Process Engineers and Constructors, Inc. 

W. J. Sperko, Sperko Engineering Services, Inc. 

E. F. Summers, jr., Babcock & Wilcox Construction Co. 

R L Vaughan, ONEOK Partners 



B31 MATERIALS TECHNICAL COMMITTEE 



R. A. Grichuk, Choir, Fluor Corp. 

N. Lobo, Secretary, The American Society of Mechanical Engineers 

M. H. Barnes, Scantec, inc. 

j. A. Cox, Lieberman Consulting LLC 

R. P. Deubler, Fronek Power Systems, LLC 

P. J. Dobson, Electricity de France 

W, H, Eskridge, Jr., Aker Solutions Engineering & Construction 



C. L. Henley, Black & Veatch 

D. W. Rahoi, Metallurgist 

R. A. Schmidt, Hackney Ladish, Inc. 

H. R. Simpson, Industry and Energy Associates, LLC 

J. L Smith, Jacobs Engineering Group 

1. Djilali, Contributing Member, BEREP 



B31 MECHANICAL DESIGN TECHNICAL COMMITTEE 



W. J. Koves, Chair, UOP LLC 
G. A. Antaki, Vice Choir, Becht Nuclear Services 
C. E. O'Brien, Secretary, The American Society of Mechanical 
Engineers 

C. Becht IV, Becht Engineering Co. 
J. P. Breen, Becht Engineering Co. 
J. P. EUenberger 

D. j. Fetzner, BP Exploration Alaska, Inc. 
J. A. Graziano, Tennessee Valley Authority 
J. D. Hart, SSD, Inc. 

R. W, Haupt, Pressure Piping Engineering Associates, Inc. 



8. P. Holbrook, Babcock Power, Inc. 

G, D. Mayers, Alion Science & Technology 

T. Q. McCawley, TQM Engineering, PC 

R. J. Medvick, Swagelok 

I C. Minichieilo, Bechtel National, Inc. 

A. W. PauHn, Paulin Research Group 

R. A. Robleto, Senior Technical Advisor 

M. J. Rosenfeld, Kiefner & Associates, Inc. 

G. Stevick, Berkeley Engineering & Research, Inc. 

E. A. Wais, Wais and Associates, Inc. 

E. C. Rodabaugh, Honorary Member, Consultant 



B31 CONFERENCE GROUP 



A. Bell, Bonneville Power Administration 

R. A. Coomes, Commonwealth of Kentucky, Dept. of Housing/Boiler 

Section 
D. H. Hanrath 

C. J. Harvey, Alabama Public Service Commission 

D. T. Jagger, Ohio Department of Commerce 
M. Kotb, Regie du Bailment du Quebec 

KL T. Lau, Alberta Boilers Safety Association 

R. G. ftrtarini, New Hampshire Public Utilities Commission 

I. W. Mault, Manitoba Department of Labour 

A. W. Meiring, Division of Fire and Building Safety/Indiana 



R. F. JVtullaney, Boiler and Pressure Vessel Safety Branch/ 

Vancouver 
P. Sher, State of Connecticut 
M. E. Skarda, Arkansas Department of Labor 
D. A. Starr, Nebraska Department of Labor 
D. J. Stursma, Iowa Utilities Board 
R. P. Sullivan, The National Board of Boiler and Pressure Vessel 

Inspectors 
J. E. Troppman, Division of Labor/State of Colorado Boiler 

Inspections 
W. A. M. West, Lighthouse Assistance, Inc. 
T. F. Wickham, Rhode Island Department of Labor 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



INTRODUCTION 



The ASME B31 Code for Pressure Piping consists of 
a number of individually published Sections, each an 
American National Standard, under the direction of 
ASME Committee B31, Code for Pressure Piping. 

Rules for each Section have been developed consider- 
ing the need for application of specific requirements for 
various types of pressure piping. Applications consid- 
ered for each Code Section include: 

B31.1 Power Piping: piping typically found in electric 
power generating stations, in industrial and institutional 
plants, geo thermal heating systems, and central and dis- 
trict heating and cooling systems; 

B31.3 Process Piping: piping typically found in petro- 
leum refineries, chemical, pharmaceutical, textile, paper, 
semiconductor, and cryogenic plants, and related pro- 
cessing plants and terminals; 

B31.4 Pipeline Transportation Systems for Liquid 
Hydrocarbons and Other Liquids: piping transporting 
products which are predominately liquid between plants 
and terminals and within terminals, pumping, regulat- 
ing, and metering stations; 

B31.5 Refrigeration Piping: piping for refrigerants and 
secondary coolants; 

B31.8 Gas Transportation and Distribution Piping 
Systems: piping transporting products which are pre- 
dominately gas between sources and terminals, includ- 
ing compressor, regulating, and metering stations; and 
gas gathering pipelines; 

B31.9 Building Services Piping: piping typically found 
in industrial, institutional, commercial, and public build- 
ings, and in multi-unit residences, which does not 
require the range of sizes, pressures, and temperatures 
covered in B31.1; 

B31.ll Slurry Transportation Piping Systems: piping 
transporting aqueous slurries between plants and termi- 
nals and within terminals, pumping, and regulating sta- 
tions. 

This is the B31.1 Power Piping Code Section. Hereafter, 
in this Introduction and in the text of this Code Section 
B31.1, where the word Code is used without specific 
identification, it means this Code Section. 

It is the owner's responsibility to select the Code 
Section which most nearly applies to a proposed piping 
installation. Factors to be considered by the owner 
include: limitations of the Code Section, jurisdictional 
requirements, and the applicability of other codes and 
standards. All applicable requirements of the selected 
Code Section shall be met. For some installations, more 
than one Code Section may apply to different parts of the 
installation. The owner is also responsible for imposing 



requirements supplementary to those of the selected 
Code Section, if necessary, to assure safe piping for the 
proposed installation. 

Certain piping within a facility may be subject to other 
codes and standards, including but not limited to: 

ASME Boiler and Pressure Vessel Code, Section III: 
nuclear power piping; 

ANSI Z223.1 National Fuel Gas Code: piping for fuel 
gas from the point of delivery to the connection of each 
fuel utilization device; 

NFPA Fire Protection Standards: fire protection sys- 
tems using water, carbon dioxide, halon, foam, dry 
chemical, and wet chemicals; 

NFPA 99 Health Care Facilities: medical and labora- 
tory gas systems; 

NFPA 8503 Standard for Pulverized Fuel Systems: pip- 
ing for pulverized coal from the coal mills to the burners; 

Building and plumbing codes, as applicable, for pota- 
ble hot and cold water, and for sewer and drain systems. 

The Code sets forth engineering requirements deemed 
necessary for safe design and construction of pressure 
piping. While safety is the basic consideration, this factor 
alone will not necessarily govern the final specifications 
for any piping system. The designer is cautioned that 
the Code is not a design handbook; it does not do away 
with the need for the designer or for competent engi- 
neering judgment. 

To the greatest possible extent, Code requirements for 
design are stated in terms of basic design principles and 
formulas. These are supplemented as necessary with 
specific requirements to assure uniform application of 
principles and to guide selection and application of pip- 
ing elements. The Code prohibits designs and practices 
known to be unsafe and contains warnings where cau- 
tion, but not prohibition, is warranted. 

The specific design requirements of the Code usually 
revolve around a simplified engineering approach to a 
subject. It is intended that a designer capable of applying 
more complete and rigorous analysis to special or 
unusual problems shall have latitude in the develop- 
ment of such designs and the evaluation of complex or 
combined stresses. In such cases the designer is responsi- 
ble for demonstrating the validity of his approach. 

This Code Section includes the following: 

(a) references to acceptable material specifications 
and component standards, including dimensional 
requirements and pressure-temperature ratings 

(b) requirements for design of components and 
assemblies, including pipe supports 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



POWER PIPING 

Chapter 1 
Scope and Definitions 



100 GENERAL 

This Power Piping Code is one of several Sections of 
the American Society of Mechanical Engineers Code for 
Pressure Piping, B31. This Section is published as a sepa- 
rate document for convenience. 

Standards and specifications specifically incorporated 
by reference into this Code are shown in Table 126.1. It 
is not considered practical to refer to a dated edition of 
each of the standards and specifications in this Code. 
Instead, the dated edition references are included in an 
Addenda and will be revised yearly, 

100.1 Scope 

Rules for this Code Section have been developed con- 
sidering the needs for applications which include piping 
typically found in electric power generating stations, in 
industrial and institutional plants, geothermal heating 
systems, and central and district heating and cooling 
systems. 

(07) 100.1.1 This Code prescribes requirements for the 

design, materials, fabrication, erection, test, inspection, 
operation, and maintenance of piping systems. 

Piping as used in this Code includes pipe, flanges, 
bolting, gaskets, valves, relief devices, fittings, and the 
pressure containing portions of other piping compo- 
nents, whether manufactured in accordance with Stan- 
dards listed in Table 126.1 or specially designed. It also 
includes hangers and supports and other equipment 
items necessary to prevent overstressing the pressure 
containing components. 

Rules governing piping for miscellaneous appurte- 
nances, such as water columns, remote water level indi- 
cators, pressure gages, gage glasses, etc., are included 
within the scope of this Code, but the requirements for 
boiler appurtenances shall be in accordance with Section 
I of the ASME Boiler and Pressure Vessel Code, PG-60. 

The users of this Code are advised that in some areas 
legislation may establish governmental jurisdiction over 
the subject matter covered by this Code. However, any 
such legal requirement shall not relieve the owner of 
his inspection responsibilities specified in para. 136.1. 



100.1.2 Power piping systems as covered by this 
Code apply to all piping and their component parts 
except as excluded in para. 100.1.3. They include but 
are not limited to steam, water, oil, gas, and air services. 

(A) This Code covers boiler external piping as defined 
below for power boilers and high temperature, high 
pressure water boilers in which: steam or vapor is gener- 
ated at a pressure of more than 15 psig [100 kPa (gage)]; 
and high temperature water is generated at pressures 
exceeding 160 psig [1 103 kPa (gage)] and /or tempera- 
tures exceeding 250°F (120°C). 

Boiler external piping shall be considered as that pip- 
ing which begins where the boiler proper terminates at 

(1) the first circumferential joint for welding end 
connections; or 

(2) the face of the first flange in bolted flanged 
connections; or 

(3) the first threaded joint in that type of connec- 
tion; and which extends up to and including the valve 
or valves required by para. 122.1. 

The terminal points themselves are considered part of 
the boiler external piping. The terminal points and pip- 
ing external to power boilers are illustrated by 
Figs. 100.1.2(A.l), 100.1.2(A.2), 100.1.2(B), and 
100.1.2(C). 

Piping between the terminal points and the valve or 
valves required by para. 122,1 shall be provided with 
Data Reports, inspection, and stamping as required by 
Section I of the ASME Boiler and Pressure Vessel Code. 
All welding and brazing of this piping shall be per- 
formed by manufacturers or contractors authorized to 
use the appropriate symbol shown in Figs. PG-105.1 
through PG-105.3 of Section I of the ASME Boiler and 
Pressure Vessel Code. The installation of boiler external 
piping by mechanical means may be performed by an 
organization not holding a Code symbol stamp. How- 
ever, the holder of a valid S, A, or PP Certificate of 
Authorization shall be responsible for the documenta- 
tion and hydrostatic test, regardless of the method of 
assembly. The quality control system requirements of 
Section I of the ASME Boiler and Pressure Vessel Code 
shall apply. These requirements are shown in Appendix J 
of this Code. 



(A09) 



1 



Copyright © 2009 by the American Society of Mechanical Engineers. 
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ASME B31.1b-2009 



(A09) Fig. 100.1.2(A.l) Code Jurisdictional Limits for Piping — An Example of Forced Flow Steam Generators With 

Mo Fixed Steam and Water Line 

Turbine valve or 
Code stop valve 
para. 122.1.7(A) 



Superheater 



o- 



Reheater 

-O 



-£<J<^]Tu 



rbine 



-tXj) To equipment 



c 



-O 



4x3>- 



Convection C_ 
and radiant „ 
section 



(^ Economizer 



D 

D 





Start-up system 
may vary to suit 
boiler manufacturer / 



Para. 122.1.7(B) 



o- 



-tx — u->- 



(y=* < [XJ>--(nA/S----^ 



From feed 
pumps 



Alternatives 

para. 122.1.7{B.9) 



Administrative Jurisdiction and Technical Responsibility 

Boiler Proper — The ASME Boiier and Pressure Vessel Code (ASME BPVC) has total administrative jurisdiction and 
technical responsibility. Refer to ASME BPVC Section I Preamble. 

Boiler External Piping and Joint (BEP) — The ASME BPVC has total administrative jurisdiction {mandatory 
certification by Code Symbol stamping, ASME Data Forms, and Authorized Inspection) of BEP. The ASME Section 
Committee B31.1 has been assigned technical responsibility. Refer to ASME BPVC Section i Preamble, fifth, sixth, 
and seventh paragraphs and ASME B31.1 Scope, para. 100.1.2(A). Applicable ASME B31.1 Editions and Addenda are 
referenced in ASME BPVC Section I, PG-58.3. 

Nonboiler External Piping and Joint (NBEP) — The ASME Code Committee for Pressure Piping, B31, has total 
administrative and technical responsibility. 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Fig. 10<U.2(A.2) Code Jurisdictional Limits for Piping - An Example of Steam Separator Type Forced Flow (A09) 
Steam Generators With Ho Fixed Steam and Water Line 

Turbine valve or Code 
stop valve para. 122.1.7(A) 



Superheater 




Turbine 



Connection 
and radiant 
section 






(^ 






c 


) 


Econom 


izer 





Steam 
separator 



1 [Xj> To equipment 



o- 



Reheater 



Water 
collector 



o- 



4Xj^~ 



°A (!f used) 



Start-up system 
may vary to suit 
boiler manufacturer 



Recirculation pump 
(V-D (if used) 




Boiler feed pump 



-<-txl^-N^— l- 



o— 



Alternatives para. 122.1.7(6.9) 

Administrative Jurisdiction and Technical Responsibility 

Boiler Proper - The ASME Boiler and Pressure Vessel Code (ASME BPVC) has total 
administrative jurisdiction and technical responsibility. Refer to ASME BPVC Section I Preamble. 
Boiler External Piping and Joint (BEP) - The ASME BPVC has total administrative jurisdiction 
(mandatory certification by Code Symbol stamping, ASME Data Forms, and Authorized 
Inspection) of BEP. The ASME Section Committee B31.1 has been assigned technical 
responsibility. Refer to ASME BPVC Section I Preamble, fifth, sixth, and seventh paragraphs 
and ASME B31.1 Scope, para. 100.1.2(A). Applicable ASME B31.1 Editions and Addenda are 
referenced in ASME BPVC Section I, PG-58.3. 

Nonboiler External Piping and Joint (NBEP) - The ASME Code Committee for Pressure Piping, 
B31, has total administrative and technical responsibility. 



2.1 



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INTENTIONALLY LEFT BLANK 



22 



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ASME B31.1b-2009 



The valve or valves required by para. 122.1 are part 
of the boiler external piping, but do not require ASME 
Boiler and Pressure Vessel Code, Section I inspection 
and stamping except for safety, safety relief, and relief 
valves; see para. 107.8.2. Refer to PG-11. 

Pipe connections meeting all other requirements of 
this Code but not exceeding NPS V 2 mav be welded to 
pipe or boiler headers without inspection and stamping 
required by Section I of the ASME Boiler and Pressure 
Vessel Code. 

(B) Nonboiler external piping includes all the piping 
covered by this Code except for that portion defined 
above as boiler external piping. 

100.1 3 This Code does not apply to the following: 

(A) economizers, heaters, pressure vessels, and 
components covered by Sections of the ASME Boiler 
and Pressure Vessel Code 

(B) building heating and distribution steam and con- 
densate piping designed for 15 psig [100 kPa (gage)] or 
less, or hot water heating systems designed for 30 psig 
[200 kPa (gage)] or less 

(C) piping for hydraulic or pneumatic tools and their 
components downstream of the first block or stop valve 
off the system distribution header 

(D) piping for marine or other installations under 
Federal control 

(E) towers, building frames, tanks, mechanical equip- 
ment, instruments, and foundations 

(07) 100.2 Definitions 

(A09) Some commonly used terms relating to piping are 
defined below. Terms related to welding generally agree 
with AWS A3.0. Some welding terms are defined with 
specified reference to piping. For welding terms used 
in this Code, but not shown here, definitions of AWS 
A3.0 apply. 

anchor: a rigid restraint providing substantially full fixa- 
tion, permitting neither translatory nor rotational dis- 
placement of the pipe. 

annealing: see heat treatments. 

arc welding: a group of welding processes wherein coales- 
cence is produced by heating with an electric arc or arcs, 
with or without the application of pressure and with or 
without the use of filler metal. 

assembly: the joining together of two or more piping 
components by bolting, welding, caulking, brazing, sol- 
dering, cementing, or threading into their installed loca- 
tion as specified by the engineering design. 

automatic welding: welding with equipment which per- 
forms the entire welding operation without constant 
observation and adjustment of the controls by an opera- 
tor. The equipment may or may not perform the loading 
and unloading of the work. 

hacking ring: backing in the form of a ring that can be 
used in the welding of piping. 



ball joint: a component which permits universal rota- 
tional movement in a piping system. 
base metal: the metal to be welded, brazed, soldered, 
or cut 

branch connection: the attachment of a branch pipe to the 
run of a main pipe with or without the use of fittings. 
braze welding: a method of welding whereby a groove, 
fillet, plug, or slot weld is made using a nonferrous filler 
metal having a melting point below that of the base 
metals, but above 840°F (450°C). The filler metal is not 
distributed in the joint by capillary action. (Bronze weld- 
ing, formerly used, is a misnomer for this term.) 
brazing: a metal joining process wherein coalescence is 
produced by use of a nonferrous filler metal having a 
melting point above 840°F (450°C) but lower than that 
of the base metals joined. The filler metal is distributed 
between the closely fitted surfaces of the joint by capil- 
lary action. 

butt joint: a joint between two members lying approxi- 
mately in the same plane. 

capacitor discharge welding (CDW): stud arc welding pro- 
cess in which DC arc power is produced, by a rapid 
discharge of stored electrical energy with pressure 
applied during or immediately following the electrical 
discharge. The process uses an electrostatic storage sys- 
tem as a pow T er source in which the weld energy is stored 
in capacitors. 

component: component as used in this Code is defined 
as consisting of but not limited to items such as pipe, 
piping subassemblies, parts, valves, strainers, relief 
devices, fittings, etc. 

specially designed component: a component designed in 
accordance with para. 104.7.2. 

standard component: a component manufactured in 
accordance with one or more of the standards listed in 
Table 126.1. 

covered piping systems (CPS): piping systems on which 
condition assessments are to be conducted. As a mini- 
mum for electric power generating stations, the CPS 
systems are to include NPS 4 and larger of the main 
steam, hot reheat steam, cold reheat steam, and boiler 
feedwater piping systems. In addition to the above, CPS 
also includes NPS 4 and larger piping in other systems 
that operate above 750°F (400°C) or above 1,025 psi 
(7 100 kPa). The Operating Company may, in its judg- 
ment, include other piping systems determined to be 
hazardous by an engineering evaluation of probability 
and consequences of failure. 

creep strength enhanced ferritic steel: steel in which the 
microstructure, consisting of low r er transformation prod- 
ucts such as martensite and bainite, is stabilized by 
controlled precipitation of temper-resistant carbides, 
carbonitrides, and/ or nitrides. 

defect: a flaw (imperfection or unintentional discontinu- 
ity) of such size, shape, orientation, location, or proper- 
ties as to be resectable. 



Copyright © 2009 by the American Society of Mechanical Engineers. 
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ASME B31.1b-2009 



discontinuity: a lack of continuity or cohesion; an inter- 
ruption in the normal physical structure of material or 
a product. 

employer: the owner, manufacturer, fabricator, contractor, 
assembler, or installer responsible for the welding, braz- 
ing, and NDE performed by his organization including 
procedure and performance qualifications. 
engineering design: the detailed design developed from 
process requirements and conforming to Code require- 
ments, including all necessary drawings and specifica- 
tions, governing a piping installation. 
equipment connection: an integral part of such equipment 
as pressure vessels, heat exchangers, pumps, etc., 
designed for attachment of pipe or piping components. 
erection: the complete installation of a piping system, 
including any field assembly, fabrication, testing, and 
inspection of the system. 

examination: denotes the procedures for all nondestruc- 
tive examination. Refer to para. 136.3 and the definition 
for visual examination. 

expansion joint: a flexible piping component which 
absorbs thermal and /or terminal movement. 
fabrication: primarily, the joining of piping components 
into integral pieces ready for assembly. It includes bend- 
ing, forming, threading, welding, or other operations 
upon these components, if not part of assembly. It may 
be done in a shop or in the field. 

face of weld: the exposed surface of a weld on the side 
from which the welding was done. 
filler metal: metal to be added in welding, soldering, 
brazing, or braze welding. 

fillet weld: a weld of approximately triangular cross sec- 
tion joining two surfaces approximately at right angles 
to each other in a lap joint, tee joint, corner joint, or 
socket weld. 

fire hazard: situation in which a material of more than 
average combustibility or explosibility exists in the pres- 
ence of a potential ignition source. 
flaw: an imperfection or unintentional discontinuity 
which is detectable by a nondestructive examination. 
full fillet weld: a fillet weld whose size is equal to the 
thickness of the thinner member joined. 
fusion: the melting together of filler metal and base metal, 
or of base metal only, which results in coalescence. 
gas welding: a group of welding processes wherein 
coalescence is produced by heating with a gas flame or 
flames, with or without the application of pressure, and 
with or without the use of filler metal. 
groove weld: a weld made in the groove between two 
members to be joined. 

heat affected zone: that portion of the base metal which 
has not been melted, but whose mechanical properties 
or microstructure have been altered by the heat of weld- 
ing or cutting. 



heat treatments 

annealing, full: heating a metal or alloy to a tempera- 
ture above the critical temperature range and holding 
above the range for a proper period of time, followed 
by cooling to below 7 that range. (A softening treatment 
is often carried out just below the critical range, which 
is referred to as a subcritical anneal.) 

normalizing: a process in which a ferrous metal is 
heated to a suitable temperature above the transforma- 
tion range and is subsequently cooled in still air at room 
temperature. 

postweld heat treatment: any heat treatment subsequent 
to welding. 

preheating: the application of heat to a base metal 
immediately prior to a welding or cutting operation. 

stress-relieving: uniform heating of a structure or por- 
tion thereof to a sufficient temperature to relieve the 
major portion of the residual stresses, followed by uni- 
form cooling. 

imperfection: a condition of being imperfect; a departure 
of a quality characteristic from its intended condition. 
indication: the response or evidence from the application 
of a nondestructive examination. 

inert gas metal arc welding: an arc welding process 
wherein coalescence is produced by heating with an. 
electric arc between a metal electrode and the work. 
Shielding is obtained from an inert gas, such as helium 
or argon. Pressure may or may not be used and filler 
metal may or may not be used. 

inspection: denotes the activities performed by an 
Authorized Inspector, or an Owner's Inspector, to verify 
that all required examinations and testing have been 
completed, and to ensure that all the documentation for 
material, fabrication, and examination conforms to the 
applicable requirements of this Code and the engi- 
neering design. 

joint design: the joint geometry together with the required 
dimensions of the wielded joint. 

joint penetration: the minimum depth of a groove weld 
extends from its face into a joint, exclusive of rein- 
forcement. 

low energy capacitor discharge welding: a resistance weld- 
ing process wherein coalescence is produced by the rapid 
discharge of stored electric energy from a low voltage 
electrostatic storage system. 

manual welding: welding wherein the entire welding 
operation is performed and controlled by hand. 
maximum, allowable stress: the maximum stress value that 
may be used in the design formulas for a given material 
and design temperature. 

maximum, allowable working pressure (MAWP): the pres- 
sure at the coincident temperature to which a boiler or 
pressure vessel can be subjected without exceeding the 
maximum allowable stress of the material or pressure- 
temperature rating of the equipment. For the purposes 
of this Code, the term MAWP is as defined in the 



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ASME B31.1b-2009 



steel: an alloy of iron and carbon with no more than 2% 
carbon by weight. Other alloying elements may include 
manganese, sulfur, phosphorus, silicon, aluminum, 
chromium, copper, nickel, molybdenum, vanadium, and 
others depending upon the type of steel. For acceptable 
material specifications for steel, refer to Chapter III, 
Materials. 

stresses 

displacement stress: a stress developed by the self- 
constraint of the structure. It must satisfy an imposed 
strain pattern rather than being in equilibrium wTth an 
external, load. The basic characteristic of a displacement 
stress is that it is self-limiting. Local yielding and minor 
distortions can satisfy the displacement or expansion 
conditions which cause the stress to occur. Failure from 
one application of the stress is not to be expected. Fur- 
ther, the displacement stresses calculated in this Code 
are " effective" stresses and are generally lower than 
those predicted by theory or measured in strain-gage 
tests. 1 

peak stress: the highest stress in the region under con- 
sideration. The basic characteristic of a peak stress is 
that it causes no significant distortion and is objection- 
able only as a possible source of a fatigue crack initiation 
or a brittle fracture. This Code does not utilize peak 
stress as a design basis, but rather uses effective stress 
values for sustained stress and for displacement stress; 
the peak stress effect is combined with the displacement 
stress effect in the displacement stress range calculation. 

sustained stress: a stress developed by an imposed load- 
ing which is necessary to satisfy the laws of equilibrium 
between external and internal forces and moments. The 
basic characteristic of a sustained stress is that it is not 
self-limiting. If a sustained stress exceeds the yield 
strength of the material through the entire thickness, the 
prevention of failure is entirely dependent on the strain- 
hardening properties of the material. A thermal stress is 
not classified as a sustained stress. Further, the sustained 
stresses calculated in this Code are "effective" stresses 
and are generally lower than those predicted by theory 
or measured in strain-gage tests. 

stress-relieving: see heat treatments. 

submerged arc welding: an arc welding process wherein 
coalescence is produced by heating with an electric arc 
or arcs between a bare metal electrode or electrodes 
and the work. The welding is shielded by a blanket of 



1 Normally, the most significant displacement stress is encoun- 
tered in the thermal expansion stress range from ambient to the 
normal operating condition. This stress range is also the stress 
range usually considered in a flexibility analysis. However, if other 
significant stress ranges occur, whether they are displacement stress 
ranges (such, as from other thermal, expansion or contraction events, 
or differential support movements) or sustained stress ranges (such 
as from cyclic pressure, steam hammer, or earthquake inertia 
forces), paras. 102.3.2(B) and 104.8.3 may be used to evaluate their 
effect on fatigue life. 



granular, fusible material on the work. Pressure is not 
used, and filler metal is obtained from the electrode and 
sometimes from a supplementary welding rod. 

supplementary steel: steel members which are installed 
between existing members for the purpose of installing 
supports for piping or piping equipment. 

swivel joint: a component which permits single-plane 
rotational movement in a piping system. 

tack weld: a weld made to hold parts of a weldment in 
proper alignment until the final welds are made. 

throat of a fillet weld 

actual: the shortest distance from the root of a fillet 
weld to its face. 

theoretical: the distance from the beginning of the root 
of the joint perpendicular to the hypotenuse of the larg- 
est right triangle that can. be inscribed within the fillet 
weld cross section. 

toe of weld: the junction between the face of the weld 
and the base metal. 

tube: refer to pipe and tube. 

tungsten electrode: a nonfiller metal electrode used in arc 
welding, consisting of a tungsten wire. 

undercut: a groove melted into the base metal adjacent 
to the toe of a weld and not filled with weld metal. 

visual examination: the observation of whatever portions 
of components, joints, and other piping elements that 
are exposed to such observation either before, during, 
or after manufacture, fabrication, assembly, erection, 
inspection, or testing. This examination may include 
verification of the applicable requirements for materials, 
components, dimensions, joint preparation, alignment, 
welding or joining, supports, assembly, and erection. 

weld: a localized coalescence of metal which is produced 
by heating to suitable temperatures, with or without the 
application of pressure, and with or without the use of 
filler metal. The filler metal shall have a melting point 
approximately the same as the base metal. 

welder: one who is capable of performing a manual or 
semiautomatic welding operation. 

Welder/Welding Operator Performance Qualification (WPQ): 
demonstration of a welder's ability to produce welds in 
a manner described in a Welding Procedure Specification 
that meets prescribed standards. 

welding operator: one who operates machine or automatic 
welding equipment. 

Welding Procedure Specification (WPS): a written qualified 
welding procedure prepared to provide direction for 
making production welds to Code requirements. The 
WPS or other documents may be used to provide direc- 
tion to the welder or welding operator to assure compli- 
ance with the Code requirements. 

weldment: an assembly whose component parts are 
joined by welding. 



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ASME B31.1b-2009 



Chapter II 
Design 



(A08) 



PARTI 
CONDITIONS AND CRITERIA 
101 DESIGN CONDITIONS 

101.1 General 

These design conditions define the pressures, temper- 
atures and various forces applicable to the design of 
power piping systems. Power piping systems shall be 
designed for the most severe condition of coincident 
pressure, temperature and loading, except as herein 
stated. The most severe condition shall be that which 
results in the greatest required pipe wall thickness and 
the highest flange rating. 

101.2 Pressure 

All pressures referred to in this Code are expressed in 
pounds per square inch and kilopascals above atmo- 
spheric pressure, i.e., psig [kPa (gage)], unless otherwise 
stated. 

101.2.2 Internal Design Pressure. The internal 
design pressure shall be not less than the maximum 
sustained operating pressure (MSOP) within the piping 
system including the effects of static head. 

101.2.4 External Design Pressure. Piping subject to 
external pressure shall be designed for the maximum 
differential pressure anticipated during operating, shut- 
down, or test conditions. 

101.2.5 Pressure Cycling. This Code does not 
address the contribution to fatigue in fittings and com- 
ponents caused by pressure cycling. Special consider- 
ation may be necessary where systems are subjected to 
a very high number of large pressure cycles. 

101.3 Temperature 

101.3.1 All temperatures referred to in this Code, 
unless otherwise stated, are the average metal tempera- 
tures of the respective materials expressed in degrees 
Fahrenheit, i.e., °F (Celsius, i.e., °C). 

101.3.2 Design Temperature 

(A) The piping shall be designed for a metal tempera- 
ture representing the maximum sustained condition 
expected. The design temperature shall be assumed to 
be the same as the fluid temperature unless calculations 
or tests support the use of other data, in which case the 
design temperature shall not be less than the average of 
the fluid temperature and the outside wall temperature. 

(B) Where a fluid passes through heat exchangers in 
series, the design temperature of the piping in each 



section of the system shall conform to the most severe 
temperature condition expected to be produced by the 
heat exchangers in that section of the system. 

(C) For steam, feed water, and hot water piping lead- 
ing from fired equipment (such as boiler, reheater, super- 
heater, economizer, etc.), the design temperature shall 
be based on the expected continuous operating condi- 
tion plus the equipment manufacturers guaranteed max- 
imum temperature tolerance. For operation at 
temperatures in excess of this condition, the limitations 
described in para. 102.2.4 shall apply. 

(D) Accelerated creep damage, leading to excessive 
creep strains and potential pipe rupture, caused by 
extended operation above the design temperature shall 
be considered in selecting the design temperature for 
piping to be operated above 800°F (425°C). 

101.4 Ambient Influences 

101.4.1 Cooling Effects on Pressure. Where the 
cooling of a fluid may reduce the pressure in the piping 
to below atmospheric, the piping shall be designed to 
withstand the external pressure or provision shall be 
made to break the vacuum. 

101.4.2 Fluid Expansion Effects. Where the expan- 
sion of a fluid may increase the pressure, the piping 
system shall be designed to withstand the increased 
pressure or provision shall be made to relieve the excess 
pressure. 

101.5 Dynamic Effects 

101.5.1 Impact. Impact forces caused by all external 
and internal conditions shall be considered in the piping 
design. One form of internal impact force is due to the 
propagation of pressure waves produced by sudden 
changes in fluid momentum. This phenomena is often 
called water or steam "hammer/' It may be caused by 
the rapid opening or closing of a valve in the system. The 
designer should be aware that this is only one example of 
this phenomena and that other causes of impact load- 
ing exist. 

101.5.2 Wind. Exposed piping shall be designed to 
withstand wind loadings. The analysis considerations 
and loads may be as described in ASCE/SEI 7, Minimum 
Design Loads for Buildings and Other Structures. 
Authoritative local meteorological data may also be 
used to define or refine the design wind forces. Where 
local jurisdictional rules covering the design of building 
structures are in effect and specify wind loadings for 
piping, these values shall be considered the minimum 



(A09) 



10 



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ASME B31.1b-2009 



design values. Wind need not be considered as acting 
concurrently with earthquakes. 

(A09) 101.5.3 Earthquake, The effect of earthquakes shall 
be considered in the design of piping, piping supports, 
and restraints. The analysis considerations and loads 
may be as described in ASCE/SEI 7. Authoritative local 
seismological data may also be used to define or refine 
the design earthquake forces. Where local jurisdictional 
rules covering the design of building structures are in 
effect and specify seismic loadings for piping, these val- 
ues shall be considered the minimum design values. 
Earthquakes need not be considered as acting concur- 
rently with wind. 

101.5.4 Vibration. Piping shall be arranged and 
supported with consideration of vibration [see paras. 
120.1(c) and 121.7.5]. 

101.6 Weight Effects 

The following weight effects combined with loads and 
forces from other causes shall be taken into account in the 
design of piping. Piping shall be carried on adjustable 
hangers or properly leveled rigid hangers or supports, 
and suitable springs, sway bracing, vibration dampen- 
ers, etc., shall be provided where necessary. 

101.6.1 Live Load. The live load consists of the 
weight of the fluid transported. Snow and ice loads shall 
be considered in localities where such conditions exist. 

101.6.2 Dead Load. The dead load consists of the 
weight of the piping components, insulation, protective 
lining and coating, and other superimposed permanent 
loads. 

101.6.3 Test or Cleaning Fluid Load. The test or 
cleaning fluid load consists of the weight of the test or 
cleaning fluid. 

101.7 Thermal Expansion and Contraction Loads 

101.7.1 General. The design of piping systems shall 
take account of the forces and moments resulting from 
thermal expansion and contraction, and from the effects 
of expansion joints. 

Thermal expansion and contraction shall be provided 
for preferably by pipe bends, elbows, offsets or changes 
in direction of the pipeline. 

Hangers and supports shall permit expansion and con- 
traction of the piping between anchors. 

101.7.2 Expansion, Swivel, or Ball Joints, and Flexible 
Metal Hose Assemblies. Joints of the corrugated bel- 
lows, slip, sleeve, ball, or swivel types and flexible metal 
hose assemblies may be used if their materials conform 
to this Code, their structural and working parts are of 
ample proportions, and their design prevents the com- 
plete disengagement of working parts while in service. 
However, flexible metal hose assemblies, and expansion 
joints of the corrugated bellows, slip, or sleeve type shall 
not be used in any piping system connecting the boiler 
and the first stop valve in that system. 



102 DESIGN CRITERIA 

102.1 General 

These criteria cover pressure-temperature ratings for 
standard and specially designed components, allowable 
stresses, stress limits, and various allowances to be used 
in the design of piping and piping components. 

102.2 Pressure-Temperature Ratings for Piping 
Components 

102.2.1 Components Having Specific Ratings. Pres- 
sure-temperature ratings for certain piping components 
have been established and are contained in some of the 
standards listed in Table 126.1. 

Where piping components have established pressure- 
temperature ratings which do not extend to the upper 
material temperature limits permitted by this Code, the 
pressure-temperature ratings between those established 
and the upper material temperature limit may be deter- 
mined in accordance with the rules of this Code, but such 
extensions are subject to restrictions, if any, imposed by 
the standards. 

Standard components may not be used at conditions 
of pressure and temperature which exceed the limits 
imposed by this Code. 

102.2.2 Components Mot Having Specific Ratings. 

Some of the Standards listed in Table 126.1, such as those 
for buttwelding fittings, specify that components shall 
be furnished in nominal thicknesses. Unless limited else- 
where in this Code, such components shall be rated for 
the same allowable pressures as seamless pipe of the 
same nominal thickness, as determined in paras. 103 
and 104 for material having the same allowable stress. 

Piping components, such as pipe, for which allowable 
stresses have been developed in accordance with para. 
102.3, but which do not have established pressure rat- 
ings, shall be rated by rules for pressure design in para. 
104, modified as applicable by other provisions of this 
Code. 

Should it be desired to use methods of manufacture 
or design of components not covered by this Code or 
not listed in referenced standards, it is intended that 
the manufacturer shall comply with the requirements 
of paras. 103 and 1 04 and other applicable requirements 
of this Code for design conditions involved. Where com- 
ponents other than those discussed above, such as pipe 
or fittings not assigned pressure-temperature ratings in 
an American National Standard, are used, the manufac- 
turer's recommended pressure-temperature rating shall 
not be exceeded. 

102.2.3 Ratings: Normal Operating Condition. A 

piping system shall be considered safe for operation if 
the maximum sustained operating pressure and temper- 
ature which may act on any part or component of the 
system does not exceed the maximum pressure and tem- 
perature allowed by this Code for that particular part 
or component. The design pressure and temperature 
shall not exceed the pressure-temperature rating for the 



11 



Copyright © 2009 by the American Society of Mechanical Engineers. 
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ASME B31.1b-2009 



particular component and material as defined in the 
applicable specification or standard listed in Table 126.1. 

102.2.4 Ratings: Allowance for Variation From Normal 
Operation. The maximum internal pressure and tem- 
perature allowed shall include considerations for occa- 
sional loads and transients of pressure and temperature. 
It is recognized that variations in pressure and temper- 
ature inevitably occur, and therefore the piping system, 
except as limited by component standards referred to 
in para. 102.2.1 or by manufacturers of components 
referred to in para. 102.2.2, shall be considered safe for 
occasional short operating periods at higher than design 
pressure or temperature. For such variations, either pres- 
sure or temperature, or both, may exceed the design 
values if the computed circumferential pressure stress 
does not exceed the maximum allowable stress from 
Appendix A for the coincident temperature by 

(A) 15% if the event duration occurs for no more than 
8 hr at any one time and not more than 800 hr/year, or 

(B) 20% if the event duration occurs for not more than 
1 hr at any one time and not more than 80 hr/year 

102.2.5 Ratings at Transitions. Where piping sys- 
tems operating at different design conditions are con- 
nected, a division valve shall be provided having a 
pressure-temperature rating equal to or exceeding the 
more severe conditions. See para. 122 for design require- 
ments pertaining to specific piping systems. 

1023 Allowable Stress Values and Other Stress 
Limits for Piping Components 

1023.1 Allowable Stress Values 

(A) Allowable stress values to be used for the design 
of power piping systems are given in the Tables in 
Appendix A, also referred to in this Code Section as the 
Allowable Stress Tables. These tables list allowable stress 
values for commonly used materials at temperatures 
appropriate to power piping installations. In every case 
the temperature is understood to be the metal tempera- 
ture. Where applicable, weld joint efficiency factors and 
casting quality factors are included in the tabulated val- 
ues. Thus, the tabulated values are values of S, SE, or 
SF, as applicable. 

(B) Allowable stress values in shear shall not exceed 
80% of the values determined in accordance with the 
rules of para. 102.3.1(A). Allowable stress values in bear- 
ing shall not exceed 160% of the determined values. 

(C) The basis for establishing the allowable stress val- 
ues in this Code Section are the same as those in the 
ASME Boiler and Pressure Vessel Code, Section II, Part 
D, Appendix 1; except that allowable stresses for cast 
iron and ductile iron are in accordance with Section VIII, 
Division 1, Appendix P for Tables UCI-23 and UCD-23, 
respectively. 



1023.2 Limits for Sustained and Displacement (07) 

Stresses 

(A) Sustained Stresses 
(A.l) Internal Pressure Stress. The calculated stress 
due to internal pressure shall not exceed the allowable 
stress values given in the Allowable Stress Tables in 
Appendix A. This criterion is satisfied when the wall 
thickness of the piping component, including any rein- 
forcement, meets the requirements of paras. 104.1 
through 104.7, excluding para. 104.1.3 but including the 
consideration of allowances permitted by paras. 102.2.4, 
102.3.3(B), and 102.4. 

(A.l) External Pressure Stress. Piping subject to 
external pressure shall be considered safe when the wall 
thickness and means of stiffening meet the requirements 
of para. 104.1.3. 

(A3) Longitudinal Stress. The sum of the longitudi- 
nal stresses, S L , due to pressure, weight, and other sus- 
tained loads shall not exceed the basic material allowable 
stress in the hot condition, S/,. 

The longitudinal pressure stress, S\ p , may be deter- 
mined by either of the following equations: 



% - 



Pd,r 



■ d } 



(B) Displacement Stress Range. The calculated refer- 
ence displacement stress range, Se (see paras. 104.8.3 
and 119.6.4), shall not exceed the allowable stress range, 
S A , calculated by eq. (1A) 

S A - /(1.25S C + 0.25S/,) (1A) 

When S h is greater than S Lf the difference between 
them may be added to the term Q.25S/, in eq. (1A). In 
that case, the allowable stress range, S A/ is calculated by 
eq. (IB) 

S A = f{1.25S c + 1.25S h - SO (IB) 

where 

f — cyclic stress range factor 1 for the total number 
of equivalent reference stress range cycles, N, 
determined from eq. (1C) 



/ - 6/N 02 < 1.0 



(1C) 



N = total number of equivalent reference displace- 
ment stress range cycles expected during the 
service life of the piping. A minimum value for 



1 Applies to essentially noncorroded piping. Corrosion can 
sharply decrease cyclic life; therefore, corrosion resistant materials 
should be considered where a large number of significant stress 
range cycles is anticipated. The designer is also cautioned that the 
fatigue life of materials operated at elevated temperatures may be 
reduced. 



12 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



shall be in accordance with the structural design stan- 
dard being used. Additional increases of allowable stress 
values, such as allowed in para. 121.2(1)/ are not per- 
mitted. 



121 DESIGN OF PIPE SUPPORTING ELEMENTS 

121.1 General 

Design of standard pipe supporting elements shall be 
in. accordance with the rules of MSS SP-5S. Allowable 
stress values and other design criteria shall be in accor- 
dance with this paragraph. Supporting elements shall 
be capable of carrying the sum of all concurrently acting 
loads as listed in para. 120. They shall be designed to 
provide the required supporting effort and allow pipe- 
line movement with thermal changes without causing 
over stress. The design shall also prevent complete 
release of the piping load in the event of spring failure 
or misalignment All parts of the supporting equipment 
shall be fabricated and assembled so that they will not 
be disengaged by movement of the supported piping. 
The maximum safe loads for bolts, threaded hanger rods, 
and all other threaded members shall be based on the 
root area of the threads. 

121.2 Allowable Stress Values 

(A) Allowable stress values tabulated in MSS SP-58 
or in Appendix A of this Code Section may be used 
for the base materials of all parts of pipe supporting 
elements. 

(B) Where allowable stress values for a material speci- 
fication listed in Table 126.1 are not tabulated in 
Appendix A or in MSS SP-58, allowable stress values 
from Section II, Part D, Tables 1A and IB of the ASME 
Boiler and Pressure Vessel Code may be used, provided 
the requirements of para. 102.3.1(B) are met. Where there 
are no stress values given in Section II, Part D, Tables 1 A 
and IB, an allowable stress value of 25% of the minimum 
tensile strength given in the material specification may 
be used, for temperatures not exceeding 650°F (345°C). 

(O For a steel material of unknown specification, or 
of a specification not listed in Table 126.1 or MSS SP-58, 
an allowable stress value of 30% of yield strength (0.2% 
offset) at room temperature may be used at temperatures 
not exceeding 650°F (345°C). The yield strength shall be 
determined through a tensile test of a specimen of the 
material and shall be the value corresponding to 0.2% 
permanent strain (offset) of the specimen. The allowable 
stress values for such materials shall not exceed 9,500 psi 
(65.5 MPa). 

(D) The allowable shear stress shall not exceed 80% 
of the values determined in accordance with the rules 
of (A), (B), and (C) above. 

(E) The allowable compressive stress shall not exceed 
the value as determined in accordance with the rules of 



(A), (B), or (C) above. In addition, consideration shall 
be given to structural stability. 

(F) The allowable bearing stress shall not exceed 160% 
of the value as determined in accordance with the rules 
of (A), (B), or (C) above. 

(G) The allowable stress in tension determined from (A09) 
(A), (B), or (C) above shall be reduced 25% for threaded 
hanger rods. 

(H) The allowable stress in partial penetration or fillet 
welds in. support assemblies shall be reduced 25% from 
those determined in accordance with (A), (B), (C), or 
(D) above for the weaker of the two metals joined. 

(I) If materials for attachments have different allow- 
able stress values than the pipe, then the allowable stress 
for the weld shall be based on the lower allowable stress 
of the materials being joined. 

(J) Increases in the allowable stress values shall be 
permitted as follows: 

(J.l) an increase of 20% for short time overloading 
during operation. 

(J. 2) an increase to 80% of the minimum yield 
strength at room temperature during hydrostatic testing. 
Where the material allowable stress has been established 
in accordance with the rules of (C) above, the allowable 
stress value during hydrostatic testing shall not exceed 
16,000 psi (110.3 MPa). 

1213 Temperature Limitations 

Parts of supporting elements that are subjected princi- 
pally to bending or tension loads and that are subjected 
to working temperatures for which carbon steel is not 
recommended shall be made of suitable alloy steel, or 
shall be protected so that the temperature of the support- 
ing member will be maintained within the appropriate 
temperature limits of the material. 

121.4 Hanger Adjustments 

Hangers used for the support of piping, NPS 2 ] / 2 and 
larger, shall be designed to permit adjustment after erec- 
tion while supporting the load. Screwed adjustments 
shall have threaded parts to conform to ASME Bl.l. 

Class 2 fit turnbuckles and adjusting nuts shall have 
the full length of thread in engagement. Means shall be 
provided for determining that full thread length is in 
engagement. All screw and equivalent adjustments shall 
be provided with suitable locking devices. 

121.5 Hanger Spacing 

Supports for piping with the longitudinal axis in 
approximately a horizontal position shall be spaced to 
prevent excessive sag, bending and shear stresses in the 
piping, with special consideration given where compo- 
nents, such as flanges and valves, impose concentrated 
loads. Where calculations are not made, suggested maxi- 
mum spacing of supports for standard and heavier pipe 
are given in Table 121 .5. Vertical supports shall be spaced 



43 



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No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table 121.5 Suggested Pipe Support Spacing 







Suggested 


Maximum Span 




Nominal 
Pipe Size, 




Water 
Service 




Steam, Gas, 
or Air Service 


NPS 


ft 




m 


ft 


m 


1 


7 




2.1 


9 


2.7 


2 


10 




3.0 


13 


4,0 


3 


12 




3.7 


15 


4.6 


4 


14 




4.3 


17 


5.2 


6 


17 




5.2 


21 


6.4 


8 


19 




5.8 


24 


7.3 


12 


23 




7.0 


30 


9.1 


16 


27 




8.2 


35 


10.7 


20 


30 




9.1 


39 


11.9 


24 


32 




9.8 


42 


12.8 



GENERAL NOTES: 



(a) 



Suggested maximum spacing between pipe supports for hori- 
zontal straight runs of standard and heavier pipe at maximum 
operating temperature of 750°F (400°C). 

(b) Does not apply where span calculations are made or where 
there are concentrated loads between supports, such as 
flanges, valves, specialties, etc. 

(c) The spacing is based on a fixed beam support with a bending 
stress not exceeding 2,300 pst (15.86 MPa) and insulated pipe 
filled with water or the equivalent weight of steel pipe for 
steam, gas, or air service, and the pitch of the line is such 
that a sag of 0.1 in. (2.5 mm) between supports is permis- 
sible. 

to prevent the pipe from being overstressed from the 
combination of all loading effects. 

121.6 Springs 

The springs used in variable or constant effort type 
supports shall be designed and manufactured in accor- 
dance with MSS SP-58. 

121.7 Fixtures 

121.7.1 Anchors and Guides 

(A) Anchors, guides, pivots, and restraints shall be 
designed to secure the desired points of piping in rela- 
tively fixed positions. They shall permit the piping to 
expand and contract freely in directions away from the 
anchored or guided point and shall be structurally suit- 
able to withstand the thrusts, moments, and other loads 
imposed. 

(B) Rolling or sliding supports shall permit free move- 
ment of the piping, or the piping shall be designed to 
include the imposed load and frictional resistance of 
these types of supports, and dimensions shall provide 
for the expected movement of the supported piping. 
Materials and lubricants used in sliding supports shall 
be suitable for the metal temperature at the point of 
sliding contact. 

(C) Where corrugated or slip- type expansion joints, 
or flexible metal hose assemblies are used, anchors and 
guides shall be provided where necessary to direct the 
expansion into the joint or hose assembly. Such anchors 



shall be designed to withstand the force specified by 
the manufacturer for the design conditions at which the 
joint or hose assembly is to be used. If this force is 
otherwise unknown, it shall be taken as the sum of the 
product of the maximum internal area times the design 
pressure plus the force required to deflect the joint or 
hose assembly. Where expansion joints or flexible metal 
hose assemblies are subjected to a combination of longi- 
tudinal and transverse movements, both movements 
shall be considered in the design and application of the 
joint or hose assembly. 

Flexible metal hose assemblies, applied in accordance 
with para. 106.4, shall be supported in such a manner 
as to be free from any effects due to torsion and undue 
strain as recommended by the manufacturer. 

121.7.2 Other Rigid Types 

(A) Hanger Rods. Safe loads for threaded hanger rods 
shall be based on the root area of the threads and 75% 
of the allowable stress of the material as provided in 
para. 121.2(G). In no case shall hanger rods less than 
% in. (9.5 mm) diameter be used for support of pipe 
NPS 2 and smaller, or less than \ in. (12.5 mm) diameter 
rod for supporting pipe NPS 2 1 /? ami larger. See 
Table 121.7.2(A) for carbon steel rods. 

Pipe, straps, or bars of strength and effective area equal 
to the equivalent hanger rod may be used instead of 
hanger rods. 

Hanger rods, straps, etc., shall be designed to permit 
the free movement of piping caused by thermal expan- 
sion and contraction. 

(B) Welded link chain of 3 / }6 in. (5.0 mm) or larger 
diameter stock, or equivalent area, may be used for pipe 
hangers with a design stress of 9,000 psi (62 MPa) 
maximum. 

(C) Cast iron in accordance with ASTM A 48 may be 
used for bases, rollers, anchors, and parts of supports 
where the loading will be mainly compression. Cast iron 
parts shall not be used in tension. 

(D) Malleable iron castings in accordance with 
ASTM A 47 may be used for pipe clamps, beam clamps, 
hanger flanges, clips, bases, swivel rings, and parts of 
pipe supports, but their use shall be limited to tempera- 
tures not in excess of 450°F (230°C). This material is 
not recommended for services where impact loads are 
anticipated. 

(E) Brackets shall be designed to withstand forces and 
moments induced by sliding friction in addition to other 
loads. 

121.7.3 Variable Supports 

(A) Variable spring supports shall be designed to 
exert a supporting force equal to the load, as determined 
by weight balance calculations, plus the weight of all 
hanger parts (such as clamp, rod, etc.) that will be sup- 
ported by the spring at the point of attachment to the 
pipe. 



(07) 
(A09) 



44 



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ASME B31.1b-2009 



products of combustion or in accordance with (D.2), 
(D.3), or (D.4) above if not so exposed 

(E) Nonferrous pipe or tubes shall not exceed NPS 3 
in diameter. 

(F) American National Standard slip-on flanges shall 
not exceed NPS 4. Attachment of slip-on flanges shall 
be by double fillet welds. The throats of the fillet welds 
shall not be less than 0.7 times the thickness of the part 
to which the flange is attached. 

(G) Hub-type flanges shall not be cut from plate 
material. 

(H) American National Standard socket welded 
flanges may be used in piping or boiler nozzles provided 
the dimensions do not exceed NPS 3 for Class 600 and 
lower and NPS 2 1 / 2 in Class 1500. 

122.1.2 Steam Piping 

(A) The value of P to be used in the formulas in para. 
104 shall be as follows: 

(A.l) For steam piping connected to the steam 
drum or to the superheater inlet header up to the first 
stop valve in each connection, the value of P shall be 
not less than the lowest pressure at which any drum 
safety valve is set to blow, and the S value shall not 
exceed that permitted for the corresponding saturated 
steam temperature. 

(A.l) For steam piping connected to the super- 
heater outlet header up to the first stop valve in each 
connection, the design pressure, except as otherwise pro- 
vided in (A.4) below shall be not less than the lowest 
pressure at which any safety valve on the superheater 
is set to blow, or not less than 85% of the lowest pressure 
at which any drum safety valve is set to blow, whichever 
is greater, and the S value for the material used shall 
not exceed that permitted for the expected steam tem- 
perature. 

(A3) For steam piping between the first stop valve 
and the second valve, when one is required by para. 
122.1.7, the design pressure shall be not less than the 
expected maximum sustained operating pressure or 85% 
of the lowest pressure at which any drum safety valve 
is set to blow, whichever is greater, and the S value for 
the material used shall not exceed that permitted for 
the expected steam temperature. 

(A.4) For boilers installed on the unit system (i.e., 
one boiler and one turbine or other prime mover) and 
provided with automatic combustion, control equipment 
responsive to steam header pressure, the design pressure 
for the steam piping shall be not less than the design 
pressure at the throttle inlet plus 5%, or not less than 
85% of the lowest pressure at which any drum safety 
valve is set to blow, or not less than the expected maxi- 
mum sustained operating pressure at any point in the 
piping system, whichever is greater, and the S value for 
the material used shall not exceed that permitted for 
the expected steam temperature at the superheater out- 
let. For forced-flow steam generators with no fixed 



steam and water line, the design pressure shall also be 
no less than the expected maximum sustained operating 
pressure, 

(A.5) The design pressure shall not be taken at less 
than 100 psig [700 kPa (gage)] for any condition of ser- 
vice or material. 

122.13 Feedwater Piping 

(A) The value of P to be used in the formulas in para. 
104 shall be as follows: 

(A.l) For piping from the boiler to and including 
the required stop valve and the check valve, the mini- 
mum value of P except as permitted in para. 122.1.3(A.4) 
shall exceed the maximum allowable working pressure 
of the boiler by either 25% or 225 psi (1 550 kPa), which- 
ever is the lesser. For an installation with an integral 
economizer without valves between the boiler and econ- 
omizer, this paragraph shall apply only to the piping 
from the economizer inlet header to and including the 
required stop valve and the check valve. 

(A.l) For piping between the required check valve 
and the globe or regulating valve, when required by 
para. 122.1.7(B), and including any bypass piping up to 
the shutoff valves in the bypass, the value of P shall be 
not less than the pressure required to feed the boiler. 

(A3) The value of P in the formula shall not be 
taken at less than 100 psig [700 kPa (gage)] for any 
condition of service or material, and shall never be less 
than the pressure required to feed the boiler. 

(A.4.) In a forced flow steam generator with no fixed 
steam and water line, the value of P for feedwater piping 
from the boiler to and including the required stop valve 
may be in accordance with the requirements of para. 
122.1.1(B). 

(B) The S value used, except as permitted in (A.4) 
above, shall not exceed that permitted for the tempera- 
ture of saturated steam at the maximum allowable work- 
ing pressure of the boiler. 

(C) The size of the feed piping between the boiler and 
the first required valve [para. 122.1.7(B)] or the branch 
feed connection [para. 122.1.7(B.4)] shall, as a minimum, 
be the same as the boiler connection. 

122.1.4 Blowoff and Blowdown Piping. Blowoffand 
blowdown piping are defined as piping connected to a 
boiler and provided with valves or cocks through which 
the water in the boiler may be blown out under pressure. 
This definition is not intended to apply to (i) drain pip- 
ing, and (ii) piping such as used on water columns, gage 
glasses, or feedwater regulators, etc., for the purpose of 
determining the operating condition of the equipment. 
Requirements for (i) and (ii) are described in paras. 
122.1.5 and 122.1.6. Blowoff systems are operated inter- 
mittently to remove accumulated sediment from equip- 
ment and /or piping, or to lower boiler water level in a 
rapid manner. Blowdown systems are primarily oper- 
ated continuously to control the concentrations of dis- 
solved solids in the boiler w 7 ater. 



47 



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ASME B31.1b-2009 



(A) Blow off piping systems from water spaces of a 
boiler, up to and including the blowoff valves, shall be 
designed in accordance with (A.l) to (A.4) below. Two 
shutoff valves are required in the blow T off system; spe- 
cific valve requirements and exceptions are given in 
para. 122.1.7(C). 

(A09) (A.l) The value of P to be used in the formulas in 

para. 1.04 shall exceed the maximum allowable working 
pressure of the boiler by either 25% or 225 psi (1 550 kPa) 
whichever is less, but shall be not less than 100 psig 
[690 kPa (gage)]. The exception to this requirement per- 
tains to miniature boilers as described in Section I, Parts 
PEB and PMB of the ASME Boiler and Pressure Vessel 
Code, w T here the value of P to be used in the formulas 
in para. 104 shall be 100 psi [690 kPa (gage)]. 

(A.l) The allowable stress value for the piping 
materials shall not exceed that permitted for the temper- 
ature of saturated steam at the maximum allowable 
working pressure of the boiler. 

(A3) All pipe shall be steel except as permitted 
below. Galvanized steel pipe and fittings shall not be 
used for blowoff piping. When the value of P does not 
exceed 100 psig [690 kPa (gage)], nonferrous pipe may 
be used and the fittings maybe bronze, cast iron, mallea- 
ble iron, ductile iron, or steel. 

CAUTION: Nonferrous alloys and austenitic stainless steels 
may be sensitive to stress corrosion cracking in certain aqueous 
environments. 

When the value of P exceeds 100 psig [690 kPa (gage)], 
the fittings shall be steel and the thickness of pipe and 
fittings shall not be less than that of Schedule 80 pipe. 
(A A) The size of blowoff piping shall be not less 
than the size of the connection on the boiler, and shall 
be in accordance with the rules contained in the ASME 
Boiler and Pressure Vessel Code, Section I, PG-59.3, 
PMB-12, and PEB-12. 

(B) The blowdown piping system from the boiler, to 
and including the shutoff valve, shall be designed in 
accordance with (B.l) through (B.4) below. Only one 
shutoff valve is required in the blowdown system. 

(B.l) The value of P to be used in the formulas in 
para. 104 shall be not less than the lowest set pressure 
of any safety valve on the boiler drum. 

(B.l) The allowable stress value for the piping 
materials shall not exceed that permitted for the temper- 
ature of saturated steam at the maximum allowable 
working pressure of the boiler. 

(B3) All pipe shall be steel except as permitted 
below 7 . Galvanized steel pipe and fittings shall not be 
used for blowdown piping. When the value of P does 
not exceed 100 psig [690 kPa (gage)], nonferrous pipe 
may be used and the fittings may be bronze, cast iron, 
malleable iron, ductile iron, or steel. 

CAUTION: Nonferrous alloys and austenitic stainless steels 
may be sensitive to stress corrosion cracking in certain aqueous 
environments. 



When the value of P exceeds 100 psig [690 kPa (gage)], 
the fittings shall be steel and the thickness of pipe and 
fittings shall not be less than that of Schedule 80 pipe. 
(BA) The size of blowdown piping shall be not less 
than the size of the connection on the boiler, and shall 
be in accordance with the rules contained in the ASME 
Boiler and Pressure Vessel Code, Section I, PG-59.3, 
PMB-12, and PEB-12. 

(C) The blowoff and blowdown piping beyond the 
required valves described in (A) and (B) above are classi- 
fied as nonboiler external piping. The requirements are 
given in para. 122.2. 

122.1.5 Boiler Drains 

(A) Complete drainage of the boiler and attached pip- 
ing shall be provided to the extent necessary to ensure 
proper operation of the steam supply system. The pipe, 
fittings, and valves of any drain line shall not be smaller 
than the drain connection, 

(B) If the drain lines are intended to be used both as 
drains and as blowoffs, then two valves are required 
and all conditions of paras. 122.1.4, 122.1.7(C), and 122.2 
shall be met. 

(C) Miniature boilers constructed in accordance with 
the rules contained in the ASME Boiler and Pressure 
Vessel Code, Section I, Parts PMB and PEB may use a 
single valve where drain lines are intended to be used for 
both blowoff and periodic automatic or manual flushing 
prior to startup. The single valve shall be designed for 
blowoff sendee but need not have locking capability. 

(D) When a drain is intended for use only when the 
boiler is not under pressure (pressurizing the boiler for 
rapid drainage is an exception), a single shutoff valve 
is acceptable under the following conditions: either the 
valve shall be a type that can be locked in the closed 
position or a suitable flanged and bolted connection that 
accepts a blank insert shall be located on the downstream 
side of the valve. When a single valve is used, it need 
not be designed for blowoff service. Single valves on 
miniature boilers constructed in accordance with the 
rules contained in the ASME Boiler and Pressure Vessel 
Code, Section 1, Parts PMB and PEB do .not require 
locking capability. 

(E) Drain piping from the drain connection, including 
the required valve(s) or the blanked flange connection, 
shall be designed for the temperature and pressure of 
the drain connection. The remaining piping shall be 
designed for the expected maximum temperature and 
pressure. Static head and possible choked flow condi- 
tions shall be considered. In no case shall the design 
pressure and temperature be less than 100 psig [690 kPa 
(gage)] and 220°F (105°C), respectively. 

122.1.6 Boiler External Piping — Miscellaneous 
Systems 

(A) Materials, design, fabrication, examination, and 
erection of piping for miscellaneous accessories, such as 



48 



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ASME B31.1b-2009 



water level indicators, water columns, gage cocks, and 
pressure gages, shall be in accordance with the applica- 
ble sections of this Code. 



48.1 



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No reproduction may be made of this material without written consent of ASME. 



INTENTIONALLY LEFT BLANK 



48.2 



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ASME B31.1b-2009 



Chapter III 
Materials 



123 GENERAL REQUIREMENTS 

Chapter III contains limitations and required qualifica- 
tions for materials based on their inherent properties. 
Use of these materials in piping systems is also subject 
to requirements and limitations in other parts of this 
Code. 

123.1 Materials and Specifications 

123.1.1 Listed Materials. Material meeting the fol- 
lowing requirements shall be considered listed and 
acceptable material: 

(A) Materials for which allowable stress values are 
listed in Appendix A or which have been approved by 
the procedure established by (C) below. 

(B) A material conforming to a specification for which 
allowable stresses are not listed in Appendix A is accept- 
able provided its use is not specifically prohibited by 
this Code Section and it satisfies one of the following 
requirements: 

(B.l) It is referenced in a standard listed in 
Table 126.1. Such a material shall be used only within 
the scope of and in the product form covered by the 
referencing standard listed in Table 126.1. 

(B.l) It is referenced in other parts of this Code 
Section and shall be used only within the scope of and 
in the product form permitted by the referencing text. 
(O Where it is desired to use materials which are not 
currently acceptable under the rules of this Code Section, 
written application shall be made to the Committee fully 
describing the proposed material and the contemplated 
use. Such material shall not be considered listed and 
not used as a listed material until it has been approved 
by the Committee and allowable stress values have been 
assigned. Details of information which should be 
included in such applications are given in Appendix VI. 
See para. 123.1.2. 

(D) Materials conforming to ASME SA or SB specifi- 
cations maybe used interchangeably with material spec- 
ified to the listed ASTM A or B specifications of the 
same number, except where the requirements of para. 
123.2.2 apply. 

(E) The tabulated stress values in Appendix A that 
are shown in italics are at temperatures in the range 
where creep and stress rupture strength govern the selec- 
tion of stresses. 

123.1.2 Unlisted Materials. Materials other than 
those meeting the requirements of para. 123.1.1 shall be 



considered unlisted materials. Such unlisted materials 
may only be used for nonboiler external piping provided 
they satisfy all of the following requirements: 

(A) Unlisted materials are certified by the material 
manufacturer to satisfy the requirements of a specifica- 
tion listed in any Code Section of the ASME B31 Code 
for Pressure Piping, the ASME Boiler and Pressure Vessel 
Code, Section II, Part D, or to a published specification 
covering chemistry, physical and mechanical properties, 
method and process of manufacture, heat treatment, and 
quality control 

(B) The allowable stresses of the unlisted materials 
shall be determined in accordance with the rules of para. 
102.3.1(C). 

(C) Unlisted materials shall be qualified for service 
within a stated range of minimum and maximum tem- 
peratures based upon data associated with successful 
experience, tests, or analysis; or a combination thereof. 

(D) The designer shall document the owner's accept- 
ance for use of unlisted material. 

(E) All other requirements of this Code are satisfied. 

123.13 Unknown Materials. Materials of unknown 
specification shall not be used for pressure containing 
piping components. 

123.1.5 Size or Thickness. Materials outside the 
limits of size or thickness given in the title or scope 
clause of any specification listed in Table 126.1 may be 
used if the material is in compliance w T ith the other 
requirements of the specification, and no other similar 
limitation is given in the rules for construction. 

123.1.6 Marking of Materials or Products. Materials 
or products marked as meeting the requirements for 
more than one grade, type, or alloy of a material specifi- 
cation or multiple specifications, are acceptable pro- 
vided 

(A) one of the markings includes the material specifi- 
cation, grade, class, and type or alloy of the material 
permitted by this Code and the material meets all the 
requirements of that specification 

(B) the appropriate allowable stress for the specified 
grade, type, or alloy of a material specification from 
Appendix A is used 

(C) all other requirements of this Code are satisfied 
for the material permitted 

123.1.7 Materials Manufactured to Other Specifica- 
tion Editions. Materials may meet the requirements of 



61 



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ASME B31.1b-2009 



material specification editions other than the editions 
listed in Appendix F provided 

(A) the materials are the same specification, grade, 
type, class, or alloy, and heat-treated condition, as appli- 
cable. 

(B) the material tensile and yield strengths shall be 
compared and any differences shall be evaluated. If the 
material has a lower strength than required by the edi- 
tion of the specification in Appendix F, the effect of the 
reduction on the allowable stress and the design shall 
be reconciled. 

123.2 Piping Components 

123.2.1 General. Materials which do not comply 
with the rules of para. 123.1 may be used for flared, 
flareless, and compression type tubing fittings, provided 
that the requirements of para. 115 are met. 

123.2.2 Boiler External Piping 

(A) Materials for boiler external piping, as defined in 
para. 100.1.2(A), shall be specified in accordance with 
ASME SA, SB, or SFA specifications. Material produced 
under an ASTM specification may be used, provided 
that the requirements of the ASTM specification are 
identical or more stringent than the ASME specification 
for the Grade, Class, or Type produced. The material 
manufacturer or component manufacturer shall certify, 
with evidence acceptable to the Authorized Inspector, 
that the ASME specification requirements have been 
met. Materials produced to ASME or ASTM material 
specifications are not limited as to country of origin. 

(B) Materials which are not fully identified shall com- 
ply with PG-10 of Section 1 of the ASME Boiler and 
Pressure Vessel Code. 

(A08) (C) In addition to materials listed in Appendix A 
without Note (1), materials that are listed in Section I 
of the ASME Boiler and Pressure Vessel Code may be 
used in boiler external piping. When such Section I mate- 
rials are used, the allowable stresses shall be those listed 
in Section II, Part D, Subpart 1, Tables 1 A and IB applica- 
ble to Section I. For these Section I materials, the applica- 
ble requirements in Table 1A, Table IB, and Section I 
paras. 3PG-5 through PG-13, FW-5, PWT-5, PMB-5, and 
PEB-5 shall me met. 

123.3 Pipe-Supporting Elements 

Materials used for pipe-supporting elements shall be 
suitable for the service and shall comply with the 
requirements of para. 121.2(C), para. 121.7.2(C), para. 
121.7.2(D), para. 123.1, or MSS SP-58. When utilizing 
MSS SP-58, the allowable stresses for unlisted materials 
shall be established in accordance with the rules of para. 
102.3.1(C) of ASME B31.1 in lieu of para. 4.4 of 
MSS SP-58. 



123.4 Longitudinal-Welded or Spiral-Welded Pipe (ags) 

With Filler Metal Added 

(A) For the purposes of para. 104.1.1, the start of the 
creep range is the highest temperature where the non- 
italicized stress values end in Appendix A. 

(B) All welds in longitudinal-welded or spiral-welded 
pipe operating in the creep range shall receive and pass 
a 100% volumetric examination (RT or UT) per the appli- 
cable material specification or in accordance with para. 
136.4.5 or 136.4.6 and Table 136.4, or the joint efficiency 
factor (used as a multiplier to the weld strength reduc- 
tion factor) from Table 102.4.7 shall be used. 

124 LIMITATIONS ON MATERIALS 

124.1 Temperature Limitations 

124.1.1 Upper Temperature Limits. The materials 
listed in the Allowable Stress Tables A-l through A-9, 
Appendix A, shall not be used at design temperatures 
above those for which stress values are given except as 
permitted by para. 122.6.2(G). 

124.1.2 Lower Temperature Limits. The designer 
shall give consideration to the possibility of brittle frac- 
ture at low service temperature. 

124.2 Steel 

(A) Upon prolonged exposure to temperatures above 
800°F (427°C), the carbide phase of plain carbon steel, 
plain nickel alloy steel, carbon-manganese alloy steel, 
manganese-vanadium alloy steel, and carbon-silicon 
steel may be converted to graphite. 

(B) Upon prolonged exposure to temperatures above 
375°F (470°C), the carbide phase of alloy steels, such as 
carbon-molybdenum, manganese-molybdenum- 
vanadium, manganese-chromium-vanadium, and 
chromium-vanadium, may be converted to graphite. 

(C) Carbon or alloy steel having carbon content of 
more than 0.35% shall not be used in welded construc- 
tion or be shaped by oxygen cutting process or other 
thermal cutting processes. 

(D) Where low alloy 2 l A% chromium steels are used (A09) 
at temperatures above 850°F (455°C), the carbon content 

of the base material and weld filler metal shall be 0.05% 
or higher. 

124.4 Cast Gray iron (aos) 

The low ductility of cast gray iron may result in sudden 
failure if shock loading (pressure, temperature, or 
mechanical) should occur. Possible shock loadings and 
consequences of failure must be considered before speci- 
fying the use of such material Cast iron components 
may be used within the nonshock pressure-temperature 
ratings established by the standards and specifications 
herein and in para. 105.2.1(B). Castings to ASME SA-27S 
and ASTM A 278 shall have maximum limits of 250 psig 
[1 725 kPa (gage)] and 450°F (230°C). 



62 



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ASME B31.1b-2009 



The following referenced paragraphs prohibit or 
restrict the use of gray cast iron for certain applications 
or to certain pressure-temperature ratings; 





Pipe supports 


121.7.2(C) 




BEP blowoff 


122.1.4(A.3) 




REP blowdown 


122.1.4(B.3) 




BEP valves and fittings 


122.1.7 




Blowoff valves 


122.1. 7(C5) & (C.6) 




Non-BEP blowoff 


122.2(A.l) 




Non-BEP blowdown. 


122.2(A.2) 




Flammable or combustible liquids 


122.7.2(A) & (B), 
122.7.4 




Flammable gases 


122.8.1(B) & (C) 




Toxic gases or liquids 


122.8.2(B) & (D) 


(A08) 


124.5 Malleable Iron 




(A09) 


Cprtoin rvnps nf mallpablp iron have k 


iw Hiirrilitv char- 



acteristics and may be subject to brittle fracture. Mallea- 
ble iron may be used for design conditions not to exceed 
350 psig [2 415 kPa (gage)] or 450°F (230°C). 

The following referenced paragraphs prohibit or 
restrict the use of malleable iron for certain applications 
or to certain pressure-temperature ratings: 



62.1 



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INTENTIONALLY LEFT BLANK 



62.2 



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ASME B32.1b-2009 



Pipe supports 
BEP blowoff 
BEP blowdown 

Non-BEP blowoff 

Non-BEP blowdown 

Flammable or combustible liquids 

Flammable gases 
Toxic gases or liquids 



(A08) 
(A09) 



121.7.2(D) 

122.1.4(A.3) 

122.1.4(B.3) 

122.2(A.l) 

122.2(A.2) 

122.7.2(A) & (B), 

122.7,4 
122.8.1(B) & (C) 
122.8.2(B) & (D) 



124.6 Ductile (Nodular) Iron 

Ductile iron components complying with ANSI/ 
AWWA C110/A21.10, C115/A21.15, C151/A21.51, or 
C153/A21..53 may be used for water and other nontoxic, 
nonflammable service, with pressure limits as specified 
in those standards and temperature limits as specified 
in para. 106(E). These components may not be used for 
boiler external piping. 

Ductile (nodular) iron components conforming to 
ASME B16.42 may be used for services including boiler 
external piping under the following conditions: 

(A) Components for boiler external piping shall be 
used only within the following limitations. 

(A.1) Only ASME SA-395 material may be used. 

(A. 2) Design pressure shall not exceed 350 psig 
[2 415kPa (gage)]. 

(A3) Design temperature shall not exceed 450°F 
(230°C). 

(B) Welding shall not be used, either in fabrication of 
the components or in their assembly as a part of a piping 
system. 

(C) The following referenced paragraphs prohibit or 
restrict the use of ductile iron for certain applications 
or to certain pressure-temperature ratings: 



BEP blowoff 

BEP blowdown 

BEP blowoff valves 

Non-BEP blowoff 

Non-BEP blowdown 

Flammable or combustible liquids 

Flammable gases 
Toxic gases or liquids 
Pipe supports 

124.7 Nonferrous Metals 



122.1.4(A.3) 
122.1.4CB.3) 

122.1.7(C5) & (C.6) 
122.2(A.l) 
122.2(A.2) 
122.7.2(A) & (B), 

122.7.4 
122.8.1(B) & (C) 
122.8.2(B) & (D) 
123.3 



Nonferrous metals may be used in piping systems 
under the following conditions: 

(A) The melting points of copper, copper alloys, alu- 
minum, and aluminum alloys must be considered partic- 
ularly where there is a fire hazard. 

(B) The Designer shall consider the possibility of gal- 
vanic corrosion when combinations of dissimilar metals, 
such as copper, aluminum, and their alloys, are used in 
conjunction with each other or with steel or other metals 
in the presence of an electrolyte. 

(C) Threaded Connections. A suitable thread com- 
pound shall be used in making up threaded joints in 



aluminum pipe to prevent seizing which might cause 
leakage and perhaps prevent disassembly. Pipe in the 
annealed temper should not be threaded. 

124.8 Gadding and Lining Materials 

Materials with cladding or lining may be used pro- 
vided that 

(a) the base material is an approved Code material. 
The allowable stress used shall be that of the base metal 
at the design temperature. 

(b) the cladding or lining is a material that in the 
judgment of the user is suitable for the intended service, 
and the cladding/ lining and its method of application 
do not detract from the serviceability of the base 
material. 

(c) bending procedures are such that damaging or 
detrimental thinning of the cladding material is pre- 
vented. 

(d) welding and the inspection of welds is in accor- 
dance with the provisions of Chapters V and VI of this 
Code. 

(e) the thickness of the cladding is not credited for 
structural strength in the piping design. 

124.9 Nonmetallic Pipe 

This Code recognizes the existence of a wide variety 
of nonmetallic piping materials which may be used on 
corrosive (either internal or external) or other specialized 
applications. Extreme care must be taken in their selec- 
tion as their design properties vary greatly and depend 
upon the material, type and grade. Particular consider- 
ation shall be given to the possibility of 

(A) destruction where fire hazard is involved. 

(B) decrease in tensile strength at slight increase in 
temperature. 

(C) effects of toxicity. Another consideration is that 
of providing adequate support for the flexible pipe. 

For nonmandatory rules for nonmetallic piping, see 
Appendix III of this Code. 

124.10 Deterioration of Materials in Service 

It is the responsibility of the engineer to select materi- 
als suitable for the intended application. Some guideline 
for selection of protective coatings for metallic piping 
are provided in Appendix IV 

125 MATERIALS APPLIED TO MISCELLANEOUS 
PARTS 

125.1 Gaskets 

Limitations on gasket materials are covered in para. 
108.4. 

125.2 Bolting 

Limitations on bolting materials are covered in 
para. 108.5. 



63 



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ASME B31.1b-2009 



Chapter IV 
Dimensional Requirements 



126 MATERIAL SPECIFICATIONS AND STANDARDS 
FOR STANDARD AND NONSTANDARD PIPING 
COMPONENTS 

126.1 Standard Piping Components 

Dimensions of standard piping components shall com- 
ply with the standards and specifications listed in Table 

126.1 in accordance with para. 100. 

126.2 Nonstandard Piping Components 

When nonstandard piping components are designed 
in accordance with para. 104, adherence to dimensional 
standards of ANSI and ASME is strongly recommended 
when practicable. 



1263 Referenced Documents 

The documents listed in Table 1.26.1 may contain refer- 
ences to codes, standards, or specifications not listed in 
this Table. Such unlisted codes, standards, or specifica- 
tions are to be used only in the context of the listed 
documents in which they appear. 

Where documents listed in Table 126.1 contain design 
rules which are in conflict with this Code, the design 
rules of this Code shall govern. 

The fabrication, assembly, examination, inspection, 
and testing requirements of Chapters V and VI apply 
to the construction of piping systems. These require- 
ments are not applicable to piping components manufac- 
tured in accordance with the documents listed in 
Table 126.1 unless specifically so stated. 



64 



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\ No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table 126.1 Specifications and Standards 



AISC Publication 



(A09) 



A5CE/5EI 7 



Manual of Steel Construction Allowable Stress Design 

ASCE Standard 

Minimum Design Loads for Buildings and Other Structures 

ASTM Ferrous Material Specifications 



Bolts, Nuts, and Studs 

A 193 /A 193M Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service 

A 194/A 194M Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature Service 

A 307 Carbon Steel Bolts and Studs, 60,000 psi Tensile Strength 

A 320/A 320M Alioy-Stee! Bolting Materials for Low-Temperature Service 

A 354 Quenched and Tempered Alloy Steel Bolts, Studs and Other Externally-Threaded Fasteners 

A 437/A 437M Alloy-Steel Turbine-Type Bolting Material Specially Heat Treated for High Temperature Service 

A 449 Quenched and Tempered Steel Bolts and Studs 

A 453 / A 453M High-Temperature Bolting Materials, With Expansion Coefficients Comparable to Austenitic Steels 

Castings 

A 47/A 47M Ferritic Malleable Iron Castings 

A 48 Gray Iron Castings 

A 126 Gray Iron Castings for Valves, Flanges, and Pipe Fittings 

A 197/A 197M Cupola Malleable Iron 

A 216/A 216M Steel Castings, Carbon Suitable for Fusion Welding for High Temperature Service 

A 217/A 217M Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts Suitable for High-Temperature Service 

A 278/A 278M Gray Iron Castings for Pressure-Containing Parts for Temperatures Up to 650°F (350°C) 

A 351/A 351M Steel Castings, Austenitic, for High -Temperature Service 

A 389/A 389M Steel Castings, Alloy, Specially Heat-Treated for Pressure-Containing Parts Suitable for High-Temperature Service 

A 395/A 395M Ferritic Ductile iron Pressure-Retaining Castings for Use at Elevated Temperatures 

A 536 Ductile Iron Castings 



Forgings 

A 105/A 105M 
A181/A181M 
A 182/A 182M 
A336/A336M 
A350/A350M 



Forgings, Carbon Steel, for Piping Components 

Forgings, Carbon Steel for General Purpose Piping 

Forged or Rolled Atloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service 

Alloy Steel Forgings for Pressure and High-Temperature Parts 

Forgings, Carbon and Low-Alloy Steel, Requiring Notch Toughness Testing for Piping Components 



Cast Pipe 

A 377 
A 426 
A 451 



Standard Index of Specifications for Ductile Iron Pressure Pipe 
Centrifugally Cast Ferritic Alloy Steel Pipe for High-Temperature Service 
Centrifugally Cast Austenitic Steel Pipe for High-Temperature Service 



Seamless Pipe and Tube 

A 106 Seamless Carbon Steel Pipe for High-Temperature Service 

A 179/A 179M Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes 

A 192 /A 192M Seamless Carbon Steel Boiler Tubes for High-Pressure Service 

A 199 Seamless Cold-Drawn intermediate Alloy-Steel Heat-Exchanger and Condenser Tubes 

A 210/A 210M Seamless Medium-Carbon Steel Boiler and Superheater Tubes 

A 213/A 213M Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes 

A 335/A 335M Seamless Ferritic Alloy Steel Pipe for High-Temperature Service 

A 369 /A 369M Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service 

A 376/A 376M Seamless Austenitic Steel Pipe for High-Temperature Central-Station Service 



65 



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ASME B31.1b-2009 



Table 126.1 Specifications and Standards (Cont'd) 



ASTM Ferrous Material Specifications (Cont'd) 

Seamless and Welded Pipe and Tube 

A 53/A 53M Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless 

A 26S/A 268M Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service 

A 312/A 312 Seamless and Welded Austenitic Stainless Steel Pipe 

A 333/A 333M Seamless and Welded Steel Pipe for Low-Temperature Service 

A 450/A 450M General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes 

A 530/A 530M General Requirements for Specialized Carbon and Alloy Steel Pipe 

A 714 High-Strength Low-Alloy Welded and Seamless Steel Pipe 

A 789/A 789M Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service 

A 790/A 790M Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe 

Welded Pipe and Tube 

A 134 Pipe, Steel, Electric-Fusion (Arc)-Welded (Sizes NPS 16 and Over) 

A 135 Electric-Resistance-Welded Steel Pipe 

A 139 Etectric-Fusion (Arc)-Welded Steel Pipe (NPS 4 in. and Over) 

A 178 Eiectric-Resistance-Welded Carbon and Carbon-Manganese Steel Boiler and Superheater Tubes 

A 214/A 214M Electric-Resistance-Welded Carbon Steel Heat-Exchanger and Condenser Tubes 

A 249/A 249M Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes 

A 254 Copper Brazed Steel Tubing 

A 358/A 358M Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service 

A 409/A 409M Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service 

A 587 Electric-Resistance-Welded Low-Carbon Steel Pipe for the Chemical Industry 

A 671 Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures 

A 672 Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures 

A 691 Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures 

A 928 Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal 



Fittings 

A 234/A 234M 
A 403/A 403M 
A 420/A 420M 
A 815 



Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and Elevated Temperature Services 

Wrought Austenitic Stainless Steel Piping Fittings 

Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service 

Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings 



Plate, Sheet, and Strip 

A 240/A 240M Heat-Resistant Chromium and Chromium-Nickel Stainless Steel Plate Sheet and Strip for Pressure Vessels 

A 283/A 283M Low and intermediate Tensile Strength Carbon Steel Plates 

A 285/A 285M Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength 

A 299/A 299M Pressure Vessel Plates, Carbon Steel, Manganese-Silicon 

A 387/A 387M Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum 

A 51 5 /A 51 5M Pressure Vessel Plates, Carbon Steel for Intermediate- and Higher-Temperature Service 

A 516/A 516M Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service 

Rods, Bars, and Shapes 

A 276/A 276M Stainless Steel Bars and Shapes 

A 322 Steel Bars, Alloy, Standard Grades 

A 479/A 479M Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels 

A 564/A 564M Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes 

A 575 Steel Bars, Carbon, Merchant Quality, M-Grades 

A 576 Steel Bars, Carbon, Hot-Wrought, Special Quality 

Structural Components 



A 36/A 36M Structural Steel 

A 125 Steel Springs, Helical, Heat Treated 

A 229/A 229M Steel Wire, Oil-Tempered for Mechanical Springs 

A 242/A 242M High-Strength Low Alloy Structural Steel 

A 992 Structural Shapes 



66 



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ASME B31.1b-2009 



Table 126.1 Specifications and Standards (Cont'd) 



MSS Standard Practices 

SP-6 Standard Finishes for Contact Faces of Pipe Ranges and Connecting-End Flanges of Valves and Fittings 

SP-9 Spot-Facing for Bronze, Iron & Steel Flanges 

SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions 

SP-42 [Note (1)] Class 150 Corrosion Resistant Gate, Globe, Angle and Check Valves With Flanged and Buttweld Ends 

SP-43 Wrought Stainless Steel Butt-Welding Fittings 

SP-45 Bypass & Drain Connection 

SP-51 Class 150 LW Corrosion Resistant Cast Flanges and Flanged Fittings 

SP-53 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - 

Magnetic Particle Examination Method 
SP-54 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - 

Radiographic Examination Method 
SP-55 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - 

Visual Method for Evaluation of Surface irregularities 
SP-58 Pipe Hangers & Supports, Materials, Design, and Manufacture 

SP-61 Hydrostatic Testing Steel Valves 

SP-67 [Note (1)] Butterfly Valves 

SP-68 High Pressure Butterfly Valves with Offset Design 

SP-69 Pipe Hangers & Supports — Selection and Application 

SP-75 Specification for High Test Wrought Butt-Welding Fittings 

SP-79 Socket Welding Reducer Inserts 

SP-80 Bronze Gate, Globe, Angle & Check Valve 

SP-83 Class 3000 Steel Pipe Unions, Socket Welding and Threaded 

(A09) SP-88 Diaphragm Valves 

SP-89 Pipe Hangers and Supports — Fabrication and Installation Practices 

SP-93 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - 

Liquid Penetrant Examination Method 
SP-94 Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - 

Ultrasonic Examination Method 
(A09) SP-95 Swaged Nipples and Bull Plugs 

SP-97 Integrally Reinforced Forged Branch Outlet Fittings — Socket Welding, Threaded and Buttwelding Ends 

SP-105 Instrument Valves for Code Applications 

(07) SP-106 Cast Copper Alloy Flanges and Flanged Fittings, Class 125, 150, and 300 

ASME Codes & Standards 

ASME Boiler and Pressure Vessel Code 

Bl.l Unified Inch Screw Threads 

B1.13M Metric Screw Threads - M Profile 

Bl.20.1 Pipe Threads, General Purpose (Inch) 

Bl.20.3 Dryseal Pipe Threads (Inch) 

B16.1 Cast Iron Pipe Flanges and Flanged Fittings - 25, 125, 250 & 800 Classes 

B16.3 Malleable Iron Threaded Fittings 

B16.4 Gray Iron Threaded Fittings 

B16.5 Pipe Flanges and Flanged Fittings 

B16.9 Factory-Made Wrought Buttwelding Fittings 

B16.10 Face-to-Face and End-to-End Dimensions of Valves 

B16.ll Forged Fittings, Socket-Welding and Threaded 

B16.14 Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads 

B16.15 Cast Bronze Threaded Fittings, Classes 125 and 250 

B16.18 Cast Copper Alloy Solder-Joint Pressure Fittings 

B16.20 Metallic Gaskets for Pipe Flanges — Ring joint, Spiral Wound, and jacketed 

B16.21 Nonmetallic Flat Gaskets for Pipe Flanges 

B16.22 Wrought Copper and Copper Alloy Solder joint Pressure Fittings 

B16.24 Cast Copper Alloy Pipe Ranges and Flanged Fittings - Class 150, 300, 400, 600, 900, 1500, and 2500 

B16.25 ButtWelding Ends 

B16.34 Valves — Flanged, Threaded, and Welding End 

B16.42 Ductile Iron Pipe Flanges and Flanged Fittings — Classes 150 and 300 

B16.47 Large Diameter Steel Flanges 

B16.48 Steel Line Blanks 

(07) B16.50 Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings 

B18.2.1 Square and Hex Bolts and Screws — inch Series 

B18.2.2 Square and Hex Nuts (Inch Series) 

69 

Copyright © 2009 by the American Society of Mechanical Engineers. ^ 

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ASME B31.1b-2009 



Table 126.1 Specifications and Standards (Cont'd) 



ASME Codes & Standards (Cont'd) 

B18.2.3.5M Metric Hex Bolts 

B18.2.3.6M Metric Heavy Hex Bolts 

B18.2.4.6M Hex Nuts, Heavy, Metric 

B1S.21.1 Lock Washers (Inch Series) 

B18.22M Washers, Metric Plain 

B18.22.1 [Note (2)] Plain Washers 

B31.3 Process Piping 

B31.4 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids 

B31.8 Gas Transmission and Distribution Piping Systems 

B36.10M Welded and Seamless Wrought Steel Pipe 

B36.19M Stainless Steel Pipe 

TDP-1 Recommended Practices for the Prevention of Water Damage to Steam Turbines Used for Electric Power Generation 
Fossil Fueled Plants 



AWS Specifications 

A3.0 Standard Welding Terms and Definitions 

(A09) D10.10 Recommended Practices for Local Heating of Welds in Piping and Tubing 

QC1 Qualification and Certification of Welding Inspectors 



AWWA and ANSi/AWWA Standards 

Ductile-iron and Gray-Iron Fittings, 3 in. Through 48 in. (76 mm Through 1200 mm), for Water and Other Liquids 

Rubber-Gasket joints for Ductile-Iron Pressure Pipe and Fittings 

Flanged Ductile-Iron Pipe With Threaded Flanges 

Thickness Design of Ductile-Iron Pipe 

Ductile-Iron Pipe, Centrifugally Cast, for Water 

Ductile-iron Compact Fittings, 3 in. Through 24 in. (76 mm Through 610 mm) and 54 in. Through 64 in. (1,400 mm 

Through 1,600 mm), for Water Service 
Steel Water Pipe— 6 in. (150 mm) and Larger 

Steel Pipe Flanges for Waterworks Service— Sizes 4 in. Through 144 in. (100 mm Through 3,600 mm) 
Dimensions for Fabricated Steel Water Pipe Fittings 

Reinforced Concrete Pressure Pipe, Steel-Cylinder Type, for Water and Other Liquids (Includes Addendum C300a-93.) 
Prestressed Concrete Pressure Pipe, Steel-Cylinder Type, for Water and Other Liquids 
Reinforced Concrete Pressure Pipe, Noncylinder Type, for Water and Other Liquids 
Design of Prestressed Concrete Cylinder Pipe 
Metal-Seated Gate Valves for Water Supply Service 
Rubber Seated Butterfly Valves 
Resilient-Seated Gate Valves for Water Supply Service 
Installation of Ductile-Iron Water Mains and Their Appurtenances 
Grooved and Shouldered joints 

(Aos) National Fire Codes 

NFPA 54/ANSi National Fuel Gas Code 

Z223.1 

NFPA 85 Boiler and Combustion Systems Hazards Code 

NFPA 1963 Standard for Fire Hose Connections 

PFI Standards 

ES-16 Access Holes and Plugs for Radiographic Inspection of Pipe Welds 

ES-24 Pipe Bending Methods, Tolerances, Process and Material Requirements 

FC1 Standard 

79-1 Proof of Pressure Ratings for Pressure Regulators 

70 



C110/A21.10 


C111/A21.11 


C115/A21.15 


C150/A21.50 


C151/A21.51 


C153/A21.53 


C200 


C207 


C208 


C300 


C301 


C302 


C304 


C500 


C504 [Note (1)] 


C509 


C600 


C606 



Copyright © 2009 by the American Society of Mechanical Engineers. 
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ASME B31.1b-2009 



The WPQ shall also show the identification symbol 
assigned to the welder or welding operator employed 
by him/her, and the employer shall use this symbol to 
identify the welding performed by the welder or weld- 
ing operator. This may be accomplished by the applica- 
tion of the symbol on the weld joint in a manner specified 
by the employer. Alternatively, the employer shall main- 
tain records which identify the weld(s) made by the 
welder or welding operator. 

128 BRAZING AND SOLDERING 

128.1 General 

128.1.1 The brazing processes that are to be used 
under this part of the Code shall meet all the test require- 
ments of Section IX of the ASME Boiler and Pressure 
Vessel Code. 

128.1.2 Soldering. Solderers shall follow the proce- 
dure in ASTM B 828, Standard Practice for Making 
Capillary Joints by Soldering of Copper and Copper 
Alloy Tube and Fittings. 

128.2 Materials 

128.2.1 Filler Metal. The brazing alloy or solder 
shall melt and flow freely within the specified or desired 
temperature range and, in conjunction with a suitable 
flux or controlled atmosphere, shall wet and adhere to 
the surfaces to be joined. 

128.2.2 Flux. A flux that is fluid and chemically 
active at brazing or soldering temperature shall be used 
w 7 hen necessary to eliminate oxidation of the filler metal 
and the surfaces to be joined, and to promote free flow 
of the brazing alloy or solder. 

1283 Preparation 

1283.1 Surface Preparation. The surfaces to be 
brazed or soldered shall be clean and free from grease, 
oxides, paint, scale, dirt, or other material that is detri- 
mental to brazing. A suitable chemical or mechanical 
cleaning method shall be used if necessary to provide 
a clean wettable surface. 

1283.2 Joint Clearance, The clearance between sur- 
faces to be joined by brazing or soldering shall be no 
larger than is necessary to allow complete capillary dis- 
tribution of the brazing alloy or solder. 

128.4 Procedure 

128.4.1 General 

(A) Qualification of the brazing procedures to be used 
and of the performance of the brazer and brazing opera- 
tors is required and shall comply with the requirements 
of para. 128.5. 

(B) No brazing shall be done if there is impingement 
of rain, snow, sleet, or high wind on the area to be 
brazed. 



128.4.2 Heating. To minimize oxidation, the joint 
shall be brought to brazing or soldering temperature in 
as short a time as possible without localized underheat- 
ing or overheating. 

128.4.3 Flux Removal. Residual flux shall be 
removed if detrimental. 

128.5 Brazing Qualification 

128.5.1 General. The qualification of the brazing- 
procedure and of the performance of brazers and brazing 
operators shall be in accordance with the requirements 
of Part QB, Section IX, ASME Boiler and Pressure Vessel 
Code, except as modified herein. 

128.5.2 Brazing Responsibility. Each employer (see 
para. 100.2) shall be responsible for the brazing per- 
formed by his/her organization and the performance of 
brazers or brazing operators employed by that organi- 
zation. 

128.53 Qualification Responsibility 

(A) Procedures. Each employer shall be responsible 
for qualifying any Brazing Procedure Specification (BPS) 
that he/she intends to have used by personnel of his/ 
her organization. However, to avoid duplication of 
effort, and subject to approval of the Owner, a BPS quali- 
fied by a technically competent group or agency may 
be used: 

(A. 1) if the group or agency qualifying the proce- 
dures meets all of the procedure qualification require- 
ments of this Code 

(A.2) if the fabricator accepts the procedure thus 
qualified 

(A3) if the user of the procedure has qualified at 
least one brazer using the BPS 

(A. 4) if the user of the procedure assumes specific 
responsibility for the procedure qualification work done 
by him/her by signing the records required by para. 
128.6 

All four of the above conditions shall be met before a 
procedure thus qualified may be used. 

(B) Brazers and Brazing Operators. Each employer 
shall be responsible for qualifying all the brazers and 
brazing operators employed by him/her. 

However, to avoid duplication of effort, he/she may 
accept a Brazer/ Brazing Operator Performance 
Qualification (BPQ) made by a previous employer (sub- 
ject to the approval of the Owner or his/her agent) on 
piping using the same or an equivalent procedure 
wherein the essential variables are within the limits 
established in Section IX, ASME Boiler and Pressure 
Vessel Code. An employer accepting such qualification 
tests by a previous employer shall obtain a copy (from 
the previous employer) of the BPQ, showing the name of 
the employer by whom the brazers or brazing operators 
were qualified, the dates of such qualification, and the 
date the brazer last brazed pressure piping components 



81 



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ASME B31.1b-2009 



under such qualification. The employer shall then pre- 
pare and sign the record required in para. 128.6 accepting 
responsibility for the ability of the brazer or brazing 
operator. 

128.6 Brazing Records 

The employer shall maintain a record signed by him/ 
her and available to the purchaser or his/her agent and 
the inspector, showing the date and results of procedure 
and performance qualification. 

The BPQ shall also show the identification symbol 
assigned to the brazer or brazing operator employed by 
him/her, and the employer shall use this symbol to 
identify the brazing performed by the brazer or brazing 
operator. This may be accomplished by the application 
of the symbol on the braze joint in a manner specified by 
the employer. Alternatively, the employer shall maintain 
records which identify the braze joints(s) made by the 
brazer or brazing operator. 

129 BENDING AND FORMING 

129.1 Bending 

Pipe may be bent by any hot or cold method and to 
any radius that will result in a bend surface free of 
cracks. Such bends shall meet the design requirements 
of para. 102.4.5 with regard to minimum wall thickness. 
Where limits on flattening and buckling are not specified 
by design, as delineated in para. 104.2.1, manufacturing 
limits of PFI ES-24 shall be met. When defaulting to 
PFI ES-24, mutual agreement between purchaser and 
fabricator beyond the stated manufacturing limits shall 
not be allowed without the approval of the designer. 

The use of bends designed as creased or corrugated 
is not prohibited. 

129.2 Forming 

Piping components may be formed (swedging, lap- 
ping, or upsetting of pipe ends, extrusion of necks, etc.) 
by any suitable hot or cold working method, provided 
such processes result in formed surfaces which are uni- 
form and free of cracks or other defects, as determined 
by method of inspection specified in the design. 

129.3 Heat Treatment of Bends and Formed 
Components 

129.3.1 Hot bending or forming is performed at 
a temperature above T crit - 100°F (56°C), where T crit is 
the lower critical temperature of the material. Cold 
bending or forming is performed at a temperature below 
T crit - 100°F (56°C). (See Table 129.3.2 for lower critical 
temperatures.) 

129.3.2 A postbending or postforming heat treat- 
ment at the time and temperature cycles listed for post- 
weld heat treatment in Table 132 is required on all carbon 
steel (P-No. 1) materials with a nominal wall thickness in 



Table 129.3.2 Approximate Lower Critical 
Temperatures 



(A09) 







Approximate 






Lower Critical 






Temperature, 






°F (°C) 


Material 




[Note (1)3 


Carbon steel (P-No. 1) 




1,340 (725) 


Carbon molybdenum steel (P-No. 3) 


1,350 (730) 


lCr-V 2 Mo (P-No. 4, Gr. No. 1 


D 


1,375 (745) 


iy A Cr-y 3 Mo (P-No. 4, Gr. No 


■ 1) 


1,430 (775) 


2V 4 Cr~lMo, 3Cr-lMo (P-No. 


5A) 


1,480 (805) 


5Cr-y 2 Mo (P-No. 5B, Gr, No. 


1) 


1,505 (820) 


9Cr 




1,475 (800) 



NOTE: 

(1) These values are intended for guidance only. The user may 

apply values obtained for the specific material in lieu of these 

values. 



excess of \ in. (19.0 mm) unless the bending or forming 
operations are performed and completed at tempera- 
tures of 1,650°F (900°C) or greater. 

129.33 A postforming or postbending heat treat- 
ment as defined below is required for all ferritic alloy 
steel (excluding P-No. 1) materials with a nominal pipe 
size 4 in. and larger or with a nominal thickness of V 2 i n - 
(13.0 mm) or greater. 

(A) If hot bending or forming is performed, the mate- 
rial shall receive a full anneal, normalize and temper, 
or tempering heat treatment as specified by the designer. 

(B) If cold bending or forming is performed, a heat 
treatment is required at the time and temperature cycle 
listed for the material in Table 132. 

129.3,4 Postbending or postforming heat treat- 
ment of other materials including austenitic stainless 
steel is neither required nor prohibited. If a postbending 
or postforming heat treatment is to be performed, the 
designer shall fully describe the procedure to be used. 

130 REQUIREMENTS FOR FABRICATING AND 
ATTACHING PIPE SUPPORTS 

130.1 Pipe Supports 

Standard pipe hangers and supports shall be fabri- 
cated in accordance with the requirements of MSS SP-58. 
Welders, welding operators, and WPSs shall be qualified 
in accordance with the requirements of the ASME Boiler 
and Pressure Vessel Code, Section IX. 

130.2 Alternate Pipe Supports 

Special hangers, supports, anchors, and guides, not 
defined as standard types of hanger components in MSS 
SP-58, shall be welded in accordance with the require- 
ments of para. 127 (para. 132 is not applicable except as 



82 



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ASME B31.1b-2009 



required by the weld procedure used) and inspected in 
accordance with the requirements of para. 136.4,2. 

130.3 Pipe Support Welds 

Welds attaching hangers, supports, guides, and 
anchors to the piping system shall conform to the 
requirements of Chapters V and VI of this Code. 

131 WELDING PREHEAT 

131.1 Minimum Preheat Requirements 

The preheat requirements listed herein are mandatory 
minimum values. 

The base metal temperature prior to welding shall be 
at or above the specified minimum temperature in all 
directions from the point of welding for a distance of 
3 in. or 1.5 times the base metal thickness (as defined 
in para. 131.4.1), whichever is greater. 

The base metal temperature for tack welds shall be 
at or above the specified minimum temperature for a 
distance not less than 1 in. in all directions from the 
point of welding. 

131.2 Different P-Nurnber Materials 

When welding two different P-Number materials, the 
minimum preheat temperature required shall be the 
higher temperature for the material to be welded. 

131.3 Preheat Temperature Verification 

The preheat temperature shall be checked by use of 
temperature-indicating crayons, thermocouple pyrome- 
ters, or other suitable methods to assure that the required 
preheat temperature is obtained prior to and uniformly 
maintained during the welding operation. 

131.4 Preheat Temperature 

The minimum preheat for all materials shall be 50°F 
(10°C) unless stated otherwise in the following para- 
graphs. 

131.4.1 Thickness referred to is the greater of the 
nominal thicknesses at the weld of the parts to be joined. 

131.4.2 P-No. 1. 175°F (80°C) for material that has 
both a specified maximum carbon content in excess of 
0.30% and a thickness at the joint in excess of 1 in. 
(25.0 mm). Preheat may be based on the actual carbon 
content as determined from a ladle or product analysis 
in accordance with the material specification in lieu of 
the maximum carbon content specified in the material 
specification. 

131.4.3 P-No. 3. 175°F (80°C) for material or prod- 
uct form that has either a specified minimum tensile 
strength in excess of 60,000 psi (413,7 MPa) or a thickness 
at the joint in excess of V 2 in. (13.0 mm). 

131.4.4 P-No. 4. 250°F (120°C) for all materials. 



131.4.5 P-Nos. 5A and SB 

(A) 400°F (200°C) for material which has either a spec- 
ified minimum tensile strength in excess of 60,000 psi 
(413.7 MPa), or has both a specified minimum chromium 
content above 6.0% and a thickness at the joint in excess 
of \ in. (13.0 mm) 

(B) 300°F (150°C) for all other materials having this 
P-Number 

131.4.6 P-No. 6. 400°F (200°C) for all materials. 

131.4.7 P»Nos. 9A and 9B 

(A) 250°F (120°C) for P-No. 9A materials 

(B) 300°F (150°C) for P-No. 9B materials 

131.4.8 P-No. 10L 300°F (150°C) with an interpass 
temperature of 450°F (230°C) maximum. 

131.4.9 P-No. 15E, 400°F (200°C) for all materials. (A09) 

PARA. 131.5 DELETED (A09) 



131.6 Interruption of Welding 

131.6.1 After welding commences, the minimum 
preheat temperature shall be maintained until any 
required PWHT is performed on P-Nos. 3, 4, 5A, 5B, 
and 6, except when all of the following conditions are 
satisfied. 

(A) A minimum of at least % in. (9.5 mm) thickness (A09) 
of weld is deposited or 25% of the welding groove is 
filled, whichever is less (the weldment shall be suffi- 
ciently supported to prevent overstressing the weld if 

the weldment is to be moved or otherwise loaded). 

(B) For P-Nos. 3, 4, and 5 A (with a chromium content 
of 3.0% maximum) materials, the weld is allowed to cool 
slowly to room temperature. 

(C) For P-No. 5B (with a chromium content greater (A09) 
than 3.0%) and P-No. 6 materials, the weld is subjected 

to an adequate intermediate heat treatment with a con- 
trolled rate of cooling. The preheat temperature may be 
reduced to 200°F (93°C) (minimum) for the purpose of 
root examination without performing an intermediate 
heat treatment. 

(D) After cooling and before welding is resumed, 
visual examination of the weld shall be performed to 
assure that no cracks have formed. 

(E) Required preheat shall be applied before welding 
is resumed. 

131.6.2 Intermediate heat treatment for P-No. 5B (A09) 
or 15E materials may be omitted entirely when using 
low-hydrogen electrodes and filler metals classified by 

the filler metal specification with an optional supple- 
mental diffusible-hydrogen designator of H8 or lower 
and suitably controlled by maintenance procedures to 
avoid contamination by hydrogen-producing sources. 
The surface of the base metal prepared for welding shall 
be free of contaminants. 



83 



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ASME B31.1b-2009 



132 POSTWELD HEAT TREATMENT 
(A09) 132.1 Minimum PWHT Requirements 

132.1.1 Before applying the detail ed requirements 
and exemptions in these paragraphs/ satisfactory qualifi- 
cation of the WPS to be used shall be performed in 
accordance with the essential variables of the ASME 
Boiler and Pressure Vessel Code, Section IX including 
the conditions of postweld heat treatment or lack of 
postweld heat treatment and including other restrictions 
listed below. Except as otherwise provided in paras. 
132.2 and 132.3, all welds in materials included in the 
P-Numbers listed in Table 132 shall be given a postweld 
heat treatment within the temperature range specified 
in Table 132. (The range specified in Table 132 may be 
modified by Table 132.1 for the low T er limit and para. 
132.2 for the upper limit.) The materials in Table 132 
are listed in accordance with the material P-Number 
grouping of Appendix A. Welds of materials not 
included in Table 132 shall be heat treated in accordance 
with the WPS. 

132.1.2 Pressure part welds and attachment w 7 eids 
using ferritic filler metals that have a specified chro- 
mium content of more than 3% shall receive a postweld 
heat treatment. The postweld heat treatment time and 
temperature range used shall be that shown in Table 132 
for a base metal of similar composition. 

132.2 Mandatory PWHT Requirements 

Heat treatment may be accomplished by a suitable 
heating method which will provide the desired heating 
and cooling rates, the required metal temperature, tem- 
perature uniformity and temperature control. 

(A) The upper limit of the PWHT temperature range 
in Table 132 is a recommended value which may be 
exceeded provided the actual temperature does not 
exceed the lower critical temperature of either material 
(see Table 129.3.2). 

(B) When parts of two different P-Numbers are joined 
by welding, the postweld heat treatment shall be that 
specified for the material requiring the higher PWHT 
temperature. When a nonpressure part is welded to a 
pressure part and PWHT is required for either part, 
the maximum PWHT temperature shall not exceed the 
maximum temperature acceptable for the pressure 
retaining part. 

(O Caution is necessary to preclude metallurgical 
damage to some materials or welds not intended or 
qualified to withstand the PWHT temperatures 
required. 

132.3 Exemptions to Mandatory PWHT Requirements 

132.3.1 Postweld heat treatment is not required 
for the following conditions: 

(A) welds in nonferrous materials 

(B) welds exempted in Table 132 



(C) welds subject to temperatures above the lower 
critical temperature (see Table 129.3.2) during fabrica- 
tion provided the WPS has been qualified with PWHT 
(see para. 132.1) at the temperature range to be reached 
during fabrication 

132.3.2 The postweld heat treatment exemption 
of Table 132 may be based on the actual chemical compo- 
sition as determined by a ladle or product analysis in 
accordance with the material specification in lieu of the 
specified or maximum specified chemical composition 
limits. 

132.3.3 Capacitor discharge welding may be used (A09) 
for welding temporary attachments and permanent non- 
structural attachments without subsequent postweld 

heat treatment on P-No. 1 through P-No. 5B materials, 
provided 

(A) a Welding Procedure Specification is prepared, 
describing the capacitor discharge equipment, the com- 
bination of materials to be joined, and the technique of 
application; qualification of the welding procedure is 
not required 

(B) the energy output of the welding process is lim- 
ited to 125 W-sec 

(C) for P-No. 5 A and P-No. 5B materials, the maxi- 
mum carbon content of the material is 0.15% 

132.4 Definition of Thickness Governing PWHT 

132.4.1 The term nominal thickness as used in 
Table 132 and Notes is the lesser thickness of (A) or (B) 
as follows: 

(A) the thickness of the weld 

(B) the thicker of the materials being joined at the 
weld 

132.4.2 Thickness of the weld, which is a factor 
in determining the nominal thickness, is defined as 
follows: 

(A) groove welds (girth and longitudinal) — the 
thicker of the tw ? o abutting ends after weld preparation, 
including I.D. machining 

(B) fillet welds — the throat thickness of the weld 

(C) partial penetration welds — the depth of the weld 
groove 

(D) material repair welds — the depth of the cavity 
to be repaired 

(E) branch wields — the weld thickness is the dimen- 
sion existing in the plane intersecting the longitudinal 
axes and is calculated as indicated for each detail using 

t c = the smaller of \ in. or 0.7t nh 

(1) for welds described in Fig. 127.4.8(D): 



Detail (a) 



Detail (b) 



weld thickness = t,^ + t c 



84 



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ASME B31.1b-2009 



weld thickness - t nh + t c 

Detail (c) 

weld thickness — greater of t nr + t c or t^ + t c 

Detail (d) 

weld thickness = t n u + t nr + t c 

Detail (e) 

weld thickness = t n > + t c 

(2) for welds described in Figs. 127.4.8(E) and (F): 

weld thickness - depth of groove weld 

+ throat thickness of cover fillet 



132.43 The term nominal material thickness as used 
in Table 132 is the thicker of the materials being joined 
at the weld. 

132.5 PWHT Heating and Cooling Requirements 

Above 600°F (315°C), the rate of heating and cooling 
shall not exceed 600°F/hr (315°C/h) divided by one- 
half the maximum thickness of material in inches at 
the weld, but in no case shall the rate exceed 600°F/hr 
(315°C/h). (See Table 132 for cooling rate requirements 
for P-Nos. 7 and 10T materials.) 

132.6 Furnace Heating 

(A) Heating an assembly in a furnace should be used 
when practical; however, the size or shape of the unit 



(A09) 



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INTENTIONALLY LEFT BLANK 



84.2 



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ASME B31.1b-2009 



Table 132 Postweld Heat Treatment (Cont'd) 



(A08) 
(A09) 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 5B 
Gr. No. 1 



1,300 (700) 

to 
1,400 (760) 



1 hr/ln. (25 mm), 
15 min minimum 



2 hr plus 15 min 
for each additional inch 
(25 mm) over 2 in. 
(50 mm) 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in, 
(50 mm) 



P-No. 6 

Gr. Nos. 1, 2, 3 



1,400 (760) 

to 
1,475 (800) 



1 hr/in. (25 mm), 
15 min minimum 



2 hr plus 15 min 
for each additional Inch 
(25 mm) over 2 in. 
(50 mm) 



GENERAL NOTE: PWHT is not mandatory for P-No. 6 Type 410 material, provided all of the following conditions are met: 

(a) the specified carbon content is not more than 0.08% 

(b) the nominal material thickness is 3 / 8 in. (10 mm) or less 

(c) the weld is made with A-No. 8, A~No. 9, or F-No. 43 filler metal 



87 



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ASME B31.1b-2009 



Table 132 Postweld Heat Treatment (Cont'd) 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(SO mm) 



Over 2 In. 
(50 mm) 



P-No. 7 
Gr. Nos. 1, 2 



1,350 (730) 

to 
1,425 (775) 



1 hr/in. (25 mm), 
15 min minimum 



2 hr plus 15 min 
for each additional inch 
(25 mm) over 2 in. 
(50 mm) 



GENERAL NOTES: 

(a) in lieu of the cooling rate described in para. 132.5, P-No. 7 material cooling rate shall be not greater than 100°F (55°C) per hr in the 
range above 1,200°F (650 C C), after which the cooling rate shall be sufficiently rapid to prevent embrittlement. 

(b) PWHT is not mandatory for P-No. 7 Type 405 material, provided ail of the following conditions are met: 

(1) the specified carbon content is not more than 0.08% 

(2) the nominal material thickness is 3 / 8 in. (10 mm) or less 

(3) the weld is made with A-No. 8, A-No. 9, or F-No, 43 filler metal 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 8 
Gr, Nos, 1, 



None 



None 



None 



2, 3, 4 



GENERAL NOTE: PWHT is neither required nor prohibited for joints between P-No, 8 austenitic stainless steels. 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°Q 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 9A 
Gr. No. 1 



1,100 (600) 

to 
1,200 (650) 



1 hr/in. (25 mm), 
15 min minimum 



2 hr plus 15 min 
for each additional inch 
(25 mm) over 2 in. 
(50 mm) 



GENERAL NOTES: 

(a) PWHT is not mandatory for P-No. 9A material when welds on pipe or attachment welds to pipe comply with all of the following condi- 
tions: 

(1) a nominal material thickness of Y 2 in. (13.0 mm) or less 

(2) a specified carbon content of the material to be welded of 0.15% or less 

(3) a minimum preheat of 250°F (120°C) is maintained during welding 

(b) When it is impractical to PWHT at the temperature range specified in Table 132, it is permissible to perform the PWHT of this material 
at lower temperatures for longer periods of time in accordance with Table 132.1, but the minimum PWHT shall not be less than 
1,000°F (550°C). 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 9B 
Gr. No. 1 



1,100 (600) 

to 
1,175 (630) 



1 hr/in. (25 mm), 
15 min minimum 



2 hr plus 15 min 
for each additional inch 
(25 mm) over 2 in. 
(50 mm) 



GENERAL NOTES: 

(a) PWHT of P-No. 9B material is not mandatory for a nominal material thickness of % in. (16.0 mm) or less provided the Welding Proce- 
dure Qualification has been made using material of thickness equal to or greater than the production weld. 

(b) When it is impractical to PWHT at the temperature range specified in Table 132, it is permissible to perform the PWHT of this material 
at lower temperatures for longer periods of time in accordance with Table 132.1, but the minimum PWHT temperature shall not be less 
than 1,000°F(550°C). 



88 



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ASAAE B31.1D-2009 



Table 132 Postweld Heat Treatment (Cont'd) 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in, 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 10H 
Gr. No. 1 



GENERAL NOTE: Postweld heat treatment is neither required nor prohibited. If any heat treatment is performed after forming or welding, it 
shall be performed within the temperature range listed below for the particular alloy, followed by a rapid cool: 



Alloy S31803 
Alloy S32550 
Alloy S32750 
All others 



1,870°F-2,010°F 
1,900°F-2,050°F 
1,880°F-2,060°F 
1,800 Q F-1,900°F 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(50 mm) 



Over 2 in. 
(50 mm) 



P-No. 101 
Gr. No. 1 



1,350 (730) 

to 
1,500 (815) 



1 hr/ln. (25 mm), 
15 min minimum 



1 hr/in. (25 mm) 



GENERAL NOTES: 

(a) In lieu of the cooling rate described in para. 132.5, the P-No. 101 material cooling rate shall be not greater than 100°F (55°C) per hr in 
the range above 1,200°F (650°C), after which the cooling rate shall be sufficiently rapid to prevent embrittlement. 

(b) Postweld heat treatment is neither required nor prohibited for a nominal thickness of l / 2 ' n - (13 mm) or less. 



88.1 



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ASME B31.1b-2009 



(A09) 



Table 132 Postweld Heat Treatment (Cont'd) 



P-Number 

From 
Appendix A 



Holding 
Temperature 
Range, °F (°C) 



Holding Time Based on Nominal Thickness 



Up to 2 in. 
(SO mm) 



Over 2 in. 
(50 mm) 



P-No. 15E 
Gr. No. 1 



1,350 (730) 

to 
1,425 (775) 



1 hr/in. (25 mm), 
30 min minimum 



5 hr plus 15 min 
for each additional inch 
(25 mm) over 5 in. 
(125 mm) 



GENERAL NOTES: 

(a) If the nominal weld thickness is < l / 2 in. (13 mm), the minimum holding temperature is 1,325°F (720°C). 

(b) For dissimilar metal welds (i.e., welds made between a P-No. 15E and another lower chromium ferritic, austenitic, or nickel-based 
steel), if filler metal chromium content is less than 3.0% or if the filler metal is nickel-based or austenitic, the minimum holding tem- 
perature Shall be 1,300°F (700°C). 

The maximum holding temperature above is to be used if the actual chemical composition of the matching filler metal used when 
making the wetd is unknown. If the chemical composition of the matching filler metal is known, the maximum holding temperature can 
be increased as follows: 

(1) If Ni + Mn < 1.50% but > 1.0%, the maximum PWHT temperature is 1,450°F (790°C). 

(2) If Ni + Mn < 1.0%, the maximum PWHT temperature is 1,470°F (800°C). 



(c) 



Explanatory Note to (c) Above: The lower transformation temperature for matching filler material is affected by alloy content, primarily 
the total of Ni + A/In. The maximum holding temperature has been set to avoid heat treatment in the intercritical zone. 

(d) If a portion of the component is heated above the heat treatment temperature allowed above, one of the following actions shall be 
performed: 

(1) The component in its entirety must be renormaltzed and tempered. 

(2) if the maximum holding temperature in the Table or Note (c)(1) above is exceeded but does not exceed 1,470°F (800°C), the 
weld metal shall be removed and replaced. 

(3) The portion of the component heated above 1,470°F (800°C) and at least 3 in. (75 mm) on either side of the overheated zone 
must be removed and be renormalized and tempered or replaced. 

(4) The allowable stress shall be that for Grade 9 material (i.e., SA-213-T9, SA-335-P9, or equivalent product specification) at the 
design temperature, provided that the portion of the component heated to a temperature greater than that allowed above is reheat 
treated within the temperature range specified above. 



88.2 



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ASME B31.1b-2009 



Table 132.1 Alternate Postweld Heat Treatment 
Requirements for Carbon and Low Alloy Steels 



Decrease in Temperatures 




Below Minimum Specified 


Minimum Holding Time at 


Temperature, 


Decreased Temperature, 


°F (°C) 


hr [Note (1)3 


50 (28) 


2 


100 (56) 


4 


150 (84) [Note (2)] 


10 


200 (112) [Note (2)] 


20 



GENERAL NOTE: Postweld heat treatment at lower temperatures for 
longer periods of time, in accordance with this Table, shall be used 
only where permitted in Table 132. 
NOTES: 

(1) Times shown apply to thicknesses up to 1 in. (25 mm). Add 
15 min/in. (15 min/25 mm) of thickness for thicknesses 
greater than 1 in. (25 mm). 

(2) A decrease of more than 100°F (56°C) below the minimum 
specified temperature is allowable only for P-No. 1, Gr. Nos. 1 
and 2 materials. 



or the adverse effect of a desired heat treatment on one 
or more components where dissimilar materials are 
involved, may dictate alternative procedures such as 
heating a section before assembly, or by applying local 
heating in accordance with para. 132.7. 

(B) An assembly may be postweld heat treated in 
more than one heat in a furnace provided there is at 
least a 1 ft (300 mm) overlap of the heated sections 
and the portion of the assembly outside the furnace is 
shielded so that the temperature gradient is not harmful. 

(C) Direct impingement of flame on the assembly is 
prohibited. 



(A09) 132.7 Local Heating 

Welds may be locally PWHT by heating a circumferen- 
tial band around the entire component with the weld 
located in the center of the band. The width of the band 
heated to the PWHT temperature for girth welds shall 
be at least three times the wall thickness at the weld of 
the thickest part being joined. For nozzle and. attachment 
welds, the width of the band heated to the PWHT tem- 
perature shall extend beyond the nozzle weld or attach- 
ment weld on each side at least two times the header 
thickness and shall extend completely around the 
header. Guidance for the placement of thermocouples on 
circumferential butt welds is provided in AWS D10.10, 
Sections 5, 6, and 8. Special consideration shall be given 
to the placement of thermocouples when heating welds 
adjacent to large heat sinks such as valves or flanges, 
or when joining parts of differing thicknesses, to ensure 
that no part of the materials subjected to the heat source 
exceeds the lower critical temperature of the material. 
Particular care must be exercised when the applicable 



PWHT temperature is close to the material's lower criti- 
cal temperature, such as for creep strength enhanced 
ferritic steels. 

133 STAMPING 

Stamping, if used, shall be performed by a method 
that will not result in sharp discontinuities. In no case 
shall stamping infringe on the minimum wall thickness 
or result in dimpling or denting of the material being 
stamped. 

CAUTIONARY NOTE: Detrimental effects can result from 
stamping of material which will be in operation under long term 
creep or creep fatigue conditions. 

135 ASSEMBLY 

135.1 General 

The assembly of the various piping components, 
whether done in a shop or as field erection, shall be 
done so that the completely erected piping conforms 
with the requirements of the engineering design. 

135.2 Alignment 

135.2.1 Equipment Connections. When making 
connections to equipment, such as pumps or turbines 
or other piping components which are sensitive to exter- 
nally induced loading, forcing the piping into alignment 
is prohibited if this action introduces end reactions 
which exceed those permitted by design. 

135.2.2 Cold Springs. Before assembling joints in 
piping to be cold sprung, an examination shall be made 
of guides, supports, and anchors for obstructions which 



89 



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ASME B31.1b-2009 



Fig. 135.53 Typical Threaded Joints Using Straight Threads 




(a) 



(b) 



(c) 



GENERAL NOTE: Threads are ASME B1.1 straight threads. 



might interfere with the desired movement or result in 
undesired movement. The gap or overlap of piping prior 
to assembly shall be checked against the design specifi- 
cations and corrected if necessary. 

135.3 Bolted Flanged Connections 

135.3.1 Fit Up. All flanged joints shall be fitted up 
so that the gasket contact surfaces bear uniformly on 
the gasket and then shall be made up with relatively 
uniform bolt stress. 

135.3.2 Gasket Compression. When bolting gas- 
keted flange joints, the gasket shall be properly com- 
pressed in accordance with the design principles 
applicable to the type of gasket being used. 

135.3.3 Cast Iron to Steel Joints. Cast iron to steel 
flanged joints in accordance with para 108.3 shall be 
assembled with care to prevent damage to the cast iron 
flange. 

135.3.4 Bolt Engagement. All bolts shall be 
engaged so that there is visible evidence of complete 
threading through the nut or threaded attachment. 

135.3.5 Nonmetallic Lined Joints. When assembling 
nonmetallic lined joints, such as plastic lined steel pipe, 
consideration should be given to maintaining electrical 
continuity between flanged pipe sections where 
required. 

135.4 Packed Joints and Caulked Joints 

Care shall be used to assure adequate engagement of 
joint members. Where packed joints are used to absorb 



thermal expansion, proper clearance shall be provided 
at the bottom of the sockets to permit movement. 

135.5 Threaded Piping 

135.5.1 Thread Compound. Any compound or 
lubricant used in threaded joints shall be suitable for 
the service conditions, and shall be compatible with the 
piping material and the service fluid. 

135.5.2 Joints for Seal Welding. Threaded joints 
which are intended to be seal welded in accordance with 
para. 127.4.5 should be made up without any thread 
compound. 

135.5.3 Joints Using Straight Threads. Some joints 
using straight threads, with sealing at a surface other 
than threads, are shown in Fig. 135.5.3. Care shall be 
used to avoid distorting the seal when incorporating 
such joints into piping assemblies by welding or brazing. 

135.5.4 Backing Off. Backing off threaded joints to 
allow for alignment is prohibited. 

135.6 Tubing Joints 

135.6.1 Flared. The sealing surface shall be free of 
injurious defects before installation. 

135.6.2 Flareless and Compression. Flareless and 
compression joints shall be assembled in accordance 
with manufacturer's recommendations. 

135.7 Ductile Iron Bell End Piping 

Assembly of ductile iron pipe, using ANSI/AWWA 
C111/A21.11 mechanical or push-on joints, shall comply 
with AWWA C600. 



90 



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ASME B31.1b-2009 



Chapter VI 
Inspection, Examination, and Testing 



136 INSPECTION AND EXAMINATION 
136.1 Inspection 

136.1.1 General. This Code distinguishes between 
"examination" and "inspection/" Inspection is the 
responsibility of the Owner and may be performed by 
employees of the Owner or a party authorized by the 
Owner, except for the inspections required by para. 
136.2. Prior to initial operation, a piping installation shall 
be inspected to assure compliance with the engineering 
design and with the material, fabrication, assembly, 
examination, and test requirements of this Code. 

136.1.2 Verification of Compliance. Compliance 
with the requirements of this Code shall be verified by 
an Authorized Inspector when a Code stamp is required 
by Section I of the ASME Boiler and Pressure Vessel 
Code. The rules of this Code and the quality control 
system requirements of Appendix A-300 of Section I of 
the ASME Boiler and Pressure Vessel Code shall apply. 
The quality control system requirements are shown in 
Appendix J of this Code. The duty of the Inspector shall 
be as defined in PG-90, Section I, of the ASME Boiler and 
Pressure Vessel Code. Data Report Forms are included in 
the Appendix of ASME Section I for use in developing 
the necessary inspection records. The Inspector shall 
assure himself/ herself that the piping has been con- 
structed in accordance with the applicable requirements 
of this Code. 

136.1.3 Rights of inspectors. Inspectors shall have 
access to any place where work concerned with the 
piping is being performed. This includes manufacture, 
fabrication, heat treatment, assembly, erection, examina- 
tion, and testing of the piping. They shall have the right 
to audit any examination, to inspect the piping using 
any appropriate examination method required by the 
engineering design or this Code, and to review all certifi- 
cations and records necessary to satisfy the Owner's 
responsibility as stated in para. 136.1.1. 

136.1.4 Qualifications of the Owner's Inspector 

(A) The Owner's Inspector shall be designated by the 
Owner and shall be an employee of the Owner, an 
employee of an engineering or scientific organization, 
or of a recognized insurance or inspection company 
acting as the Owner's agent. The Ow 7 ner 's Inspector shall 
not represent nor be an employee of the piping manufac- 
turer, fabricator, or erector unless the Owner is also the 
manufacturer, fabricator, or erector. 



(B) The Owner's Inspector shall have not less than 10 
years experience in. the design, manufacture, erection, 
fabrication, or inspection of power piping. Each year of 
satisfactorily completed work toward an engineering 
degree recognized by the Accreditation Board for Engi- 
neering and Technology shall be considered equivalent 
to 1 year of experience, up to 5 years total. 

CO In delegating the performance of inspections, the 
Owner is responsible for determining that a person to 
whom an inspection function is delegated is qualified 
to perform that function. 

136.2 Inspection and Qualification of Authorized 
Inspector for Boiler External Piping 

136.2.1 Piping for which inspection, and stamping 
is required as determined in accordance with para. 
100.1.2(A) shall be inspected during construction and 
after completion and at the option of the Authorized 
Inspector at such stages of the work as he/she may 
designate. For specific requirements see the applicable 
parts of Section I of the ASME Boiler and Pressure Vessel 
Code, PG-104 through PG-113. Each manufacturer, fabri- 
cator, or assembler is required to arrange for the services 
of Authorized Inspectors. 

136.2.1.1 The inspections required by this Sec- 
tion shall be performed by an Inspector employed by 
an ASME accredited Authorized Inspection Agency. 

136.2.2 Certification by stamping and Data 
Reports, where required, shall be as per PG-104, PG-105, 
PG-109, PG-110, PG-111, and PG-112 of Section I of the 
ASME Boiler and Pressure Vessel Code. 

136.3 Examination 

136.3.1 General. Examination denotes the func- 
tions performed by the manufacturer, fabricator, erector, 
or a party authorized by the Owner w 7 hich include non- 
destructive examinations (NDE), such as visual, radiog- 
raphy, ultrasonic, eddy current, liquid penetrant, and 
magnetic particle methods. The degree of examination 
and the acceptance standards beyond the requirements 
of this Code shall be a matter of prior agreement between 
the manufacturer, fabricator, or erector and the Owner. 

136.3.2 Qualification of NDE Personnel. Personnel 
who perform nondestructive examination of welds shall 
be qualified and certified for each examination method 
in accordance with a program established by the 



91 



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ASME B31.1b-2009 



employer of the personnel being certified, which shall 
be based on the following minimum requirements: 

(A) instruction in the fundamentals of the nonde- 
structive examination method. 

(B) on-the-job training to familiarize the NDE person- 
nel with the appearance and interpretation of indica- 
tions of weld defects. The length of time for such training 
shall be sufficient to assure adequate assimilation of the 
knowledge required. 

(C) an eye examination performed at least once each 
year to determine optical capability of NDE personnel 
to perform the required examinations. 

(D) upon completion of (A) and (B) above, the NDE 
personnel shall be given an oral or written examination 
and performance examination by the employer to deter- 
mine if the NDE personnel are qualified to perform the 
required examinations and interpretation of results. 

(E) certified NDE personnel whose work has not 
included performance of a specific examination method 
for a period of 1 year or more shall be recertified by 
successfully completing the examination of (D) above 
and also passing the visual examination of (C) above. 
Substantial changes in procedures or equipment shall 
require recertification of the NDE personnel. 

As an alternative to the preceding program, the 
requirements of ASME Section V, Article 1 may be used 
for the qualification of NDE personnel. Personnel quali- 
fied to AWS QC1 may be used for the visual examination 
of welds. 

136.4 Examination Methods of Welds 

(07) 136.4.1 Nondestructive Examination. Nondestruc- 

(A09) tive examinations shall be performed in accordance with 
the requirements of this Chapter. The types and extent 
of mandatory examinations for pressure welds and 
welds to pressure retaining components are specified 
in Table 136.4. For welds other than those covered by 
Table 136.4, only visual examination is required. Welds 
requiring nondestructive examination shall comply with 
the applicable acceptance standards for indications as 
specified in paras. 136.4.2 through 136.4.6. As a guide, 
the detection capabilities for the examination method 
are shown in Table 136.4.1. Welds not requiring examina- 
tion (i.e., RT, UT, MT, or PT) by this Code or the engi- 
neering design shall be judged acceptable if they meet 
the examination requirements of para. 136.4.2 and the 
pressure test requirements specified in para. 137. NDE 
for P-Nos. 3, 4, 5A, 5B, and 15E material welds shall be 
performed after postweld heat treatment unless directed 
otherwise by engineering design. Required NDE for 
w r elds in all other materials may be performed before 
or after postweld heat treatment. 

136.4.2 Visual Examination. Visual examination as 
defined in para. 100.2 shall be performed in accordance 
with the methods described in Section V, Article 9, of 



the ASME Boiler and Pressure Vessel Code. Visual exam- 
inations may be conducted, as necessary during the 
fabrication and erection of piping components to pro- 
vide verification that the design and WPS requirements 
are being met. In addition, visual examination shall be 
performed to verify that all completed welds in pipe 
and piping components comply with the acceptance 
standards specified in (A) below or with the limitations 
on imperfections specified in the material specification 
under which the pipe or component was furnished. 

(A) Acceptance Standards. The following indications 
are unacceptable: 

(A.l) cracks — external surface. 

(A.2) undercut on surface which is greater than 
%2 m > (1-0 mm) deep. 

(A3) weld reinforcement greater than specified in 
Table 127,4.2. 

(A. 4) lack of fusion on surface. 

(A.5) incomplete penetration (applies only when 
inside surface is readily accessible). 

(A. 6) any other linear indications greater than % 6 in. 
(5.0 mm) long. 

(A J) surface porosity with rounded indications 
having dimensions greater than % 6 in. (5.0 mm) or four 
or more rounded indications separated by V 16 in. 
(2.0 mm) or less edge to edge in any direction. Rounded 
indications are indications which are circular or elliptical 
with their length less than three times their width. 

136.4.3 Magnetic Particle Examination. Whenever 
required by this Chapter (see Table 136.4), magnetic 
particle examination shall be performed in accordance 
with the methods of Article 7, Section V, of the ASME 
Boiler and Pressure Vessel Code. 
(A) Evaluation of Indications 

(A.l) Mechanical discontinuities at the surface will 
be indicated by the retention of the examination 
medium. All indications are not necessarily defects; 
however, certain metallurgical discontinuities and mag- 
netic permeability variations may produce similar indi- 
cations which are not relevant to the detection of 
unacceptable discontinuities. 

(A.2) Any indication which is believed to be nonrel- 
evant shall be reexamined to verify whether or not actual 
defects are present. Surface conditioning may precede 
the reexamination. Nonrelevant indications which 
would mask indications of defects are unacceptable. 

(A3) Relevant indications are those which result 
from unacceptable mechanical discontinuities. Linear 
indications are those indications in which the length is 
more than three times the width. Rounded indications 
are indications which are circular or elliptical with the 
length less than three times the width. 

(A A) An indication of a discontinuity may be larger 
than the discontinuity that causes it; however, the size 
of the indication and not the size of the discontinuity 
is the basis of acceptance or rejection. 



92 



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ASME B31.1b-2009 



MANDATORY APPENDICES 



MANDATORY APPENDIX A 



Begins on next page. 



101 



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ASME B31.1b-2009 



Table A-l Carbon Steel 



Spec. 
No. 



Grade 



Type or Class 



Nominal P- 

Composition No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Seamless Pipe and Tube 

A 53 A 

B 



A 106 

A 179 
A 192 

A 210 

A 333 
A 369 

API 5L 



A-l 

C 

1 
6 

FPA 
FPB 

A 
B 



Furnace Butt Welded Pipe 
A 53 ... F 



API 5L 



A25 



I . 



Electric Resistance Welded Pipe and Tube 
A 53 A E 



(A09) 



A 135 



A 178 



A 214 



A 333 



c 


1 


(2) 


48 


30 


1.00 


C-Mn 


1 


(2) 


60 


35 


1.00 


C-Si 


1 


(2) 


48 


30 


1.00 


C-Si 


1 


(2) 


60 


35 


1.00 


C-Si 


1 


(2) 


70 


40 


1.00 


C 


1 


(D(2)(5) 


(47) 


26 


1.00 


C-Si 


1 


(2X5) 


(47) 


26 


1.00 


C-Si 


1 


(2) 


60 


37 


1.00 


C-Mn-Si 


1 


(2) 


70 


40 


1.00 


C-Mn 


1 


CD 


55 


30 


1.00 


C-Mn-Si 


1 


(i) 


60 


35 


1.00 


C-Si 


1 


(2) 


48 


30 


1.00 


C-Mn 


1 


(2) 


60 


35 


1.00 


C 


1 


(1)(2)(14) 


48 


30 


1.00 


C-Mn 


1 


(D(2)(14) 


60 


35 


1.00 


C 


1 


(4) 


48 


30 


0.60 


C 


1 


(0(4X14) 


45 


25 


0.60 


c 


1 


(2) 


48 


30 


0.85 


C-Mn 


1 


(2) 


60 


35 


0.85 


C 


1 


(1X2) 


48 


30 


0.85 


C-Mn 


1 


(0(2) 


60 


35 


0.85 


C 


1 


(2) (5) 


(47) 


26 


0.85 


C 


1 


(2) 


60 


37 


0.85 



C-Mn 
C-Mn-Si 



(0(2X5) 



(1) 
(1) 



(47) 



55 
60 



26 



30 
35 



0.85 



0.85 

0.85 



102 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 

to Spec. 

100 200 300 400 500 600 650 700 750 800 Grade No. 



Seamless Pipe and Tube 



13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


12.5 


10.7 


9.0 


A 


A 53 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


B 




13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


12.5 


10.7 


9.0 


A 


A 106 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


B 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.8 


18.3 


14.8 


12.0 


C 




13.4 


13.4 


13.4 


13.4 


13.4 


13.3 


12.8 


12.4 


10.7 


9.2 




A 179 


13.4 


13.4 


13.4 


13.4 


13.4 


13.3 


12.8 


12.4 


10.7 


9.0 




A 192 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


A-l 


A 210 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.8 


18.3 


14.8 


12.0 


C 




15.7 


15.7 


15.7 


15.7 


15.7 


15.3 


14.8 








1 


A 333 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 






6 




13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


13,7 


12.5 


10.7 


9.0 


FPA 


A 369 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


FPB 




13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


13.7 


12.5 


10.7 


9.0 


A 


API 5L 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


B 
























Furnace Butt Welded Pipe 


8.2 


8.2 


8.2 


8.2 


8.2 


8.2 


8.2 


7.5 








A 53 


7.7 


7 J 


7 J 


7.7 














A25 


API 5L 


















Electri 


c Resistance Welded Pipe 


and Tube 


11.7 


11.7 


11.7 


11.7 


11.7 


11.7 


11.7 


10.6 


9.1 


7.7 


A 


A 53 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


13.3 


11.1 


9.2 


B 




11.7 


11.7 


11.7 


11.7 


11.7 


11.7 


11.7 


10.6 


9.1 


7.9 


A 


A 135 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


13.3 


11.1 


9.2 


B 




11.4 


11.4 


11.4 


11.4 


11.4 


11.3 


10.9 


10.5 


9.1 


7.7 


A 


A 178 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


13.3 


11.1 


9.2 


C 





11,4 11.4 11.4 11.4 11.4 11.3 10.9 10.5 9.1 7.8 ... A 214 



1 A 333 

13.3 ... ... 6 



13.4 


13.4 


13.4 


13.4 


13.4 


13.0 


12.6 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 


14.6 



103 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



(£J! S 



(A09) 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 



Spec. 
No. 



Grade 



Type or Class 



Nominal 
Composition 



P- 
No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Electric Resistance Welded Pipe and Tube (Cont'd) 

API 5L A25 i & li 

A 



A 587 ... ... C 

Electric Fusion Welded Pipe — Filler Metal Added 
A 134 



A 134 



A 139 



API 5L 



A 211 



A 671 



A 671 



A 671 



A 671 



A 671 



c 


1 


(1)(14) 


45 


25 


0.85 


c 


1 


(1)(2)(14) 


48 


30 


0.85 


C-Mn 


1 


(1)(2)(U) 


60 


35 


0.85 



(1)(2) 



48 



30 



0.85 



A283A 




C 


1 


(1)(7) 


45 


24 


0.80 


A283B 




C 


1 


(D(7) 


50 


27 


0.80 


A283C 




C 


1 


(1X7) 


55 


30 


0.80 


A283D 




C 


1 


(1)(7) 


60 


33 


0.80 


A285A 




C 


1 


(1)(2)(8) 


45 


24 


0.80 


A285B 




C 


1 


(D(2) (8) 


50 


27 


0.80 


A285C 




C 


1 


(1)(2)(8) 


55 


30 


0.80 


A 




C 


1 


(1X2X14) 


48 


30 


0.80 


B 




C-Mn 


1 


(1X2X14) 


60 


35 


0.80 


A 




C 


1 


(1)(2)(14) 


48 


30 


0.90 


B 




C-Mn 


1 


(1)(2)(14) 


60 


35 


0.90 


A570-30 




C 


1 


(1) (7) (14) (16) 


49 


30 


0.75 


A570-33 




C 


1 


(1) (7) (14) (16) 


52 


33 


0.75 


A570-40 




C 


1 


(1)(7X14)(16) 


55 


40 


0.75 


CA55 


10,13 


C 


1 


(1)(2)(15) 


55 


30 


0.90 


CA55 


11,12 


C 


1 


(1)(2)(15) 


55 


30 


1.00 


CA55 


20,23,30,33 


C 


1 


(1)(2) 


55 


30 


0.90 


CAS 5 


21,22,31,32 


C 


1 


(1)(2) 


55 


30 


1.00 


CB60 


10,13 


C-Si 


1 


(1)(2)(15) 


60 


32 


0.90 


CB60 


11,12 


C-Si 


1 


(1)(2)(15) 


60 


32 


1.00 


CB60 


20,23,30,33 


■C-Si 


1 


(D(2) 


60 


32 


0.90 


CB60 


21,22,31,32 


C-Si 


1 


(D(2) 


60 


32 


1.00 


CB65 


10,13 


C-Si 


1 


(1)(2)(15) 


65 


35 


0.90 


CB65 


11,12 


C-Si 


1 


(1)(2)(15) 


65 


35 


1.00 


CB65 


20,23,30,33 


C-Si 


1 


(D(2) 


65 


35 


0.90 


CB65 


21,22,31,32 


C-Si 


1 


(1)(2) 


65 


35 


1.00 


CB70 


10,13 


C-Si 


1 


(1)(2)(15) 


70 


38 


0.90 


CB70 


11,12 


C-Si 


1 


(1)(2)(15) 


70 


38 


1.00 


CB70 


20,23,30,33 


C-Si 


1 


(1X2) 


70 


38 


0.90 


CB70 


21,22,31,32 


C-Si 


1 


(1X2) 


70 


38 


1.00 


CC60 


10,13 


C-Mn-Si 


1 


(1)(2)(15) 


60 


32 


0.90 


CC60 


11,12 


C-Mn-Si 


1 


(1)(2)(15) 


60 


32 


1.00 


CC60 


20,23,30,33 


C-Mn-Si 


1 


(D(2) 


60 


32 


0.90 


CC60 


21,22,31,32 


C-Mn-Si 


1 


(1X2) 


60 


32 


1.00 



104 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 





Maximum Allowable Stress Values 


in Tension, 


ksi, for Metal Temperature, °F, Not Exceeding 








-20 
to 




















Spec. 


100 


200 


300 


400 


500 


600 


650 


700 


750 


800 


Grade 


No. 
















Electric Fusion Welded Pipe - 


- Filler Metal Added (Cont'd) 


16,7 


16.7 


16.7 


16.7 


16.7 


16.1 


15.6 


15.0 


12.5 


103 


B65 


A 672 


18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


17.3 


16.7 


13.9 


11 A 


865 




16.7 


16.7 


16.7 


16.7 


16.7 


16.1 


15.6 


15.0 


12.5 


103 


B65 




18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


17.3 


16.7 


13.9 


11.4 


B65 




18.0 


18.0 


18.0 


18.0 


18.0 


17.5 


16.9 


16.3 


133 


10.8 


B70 


A 672 


20.0 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.1 


14.8 


12.0 


B70 




18.0 


18.0 


18.0 


18.0 


18.0 


17.5 


16.9 


16.3 


13.3 


10.8 


B70 




20.0 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.1 


14.8 


12.0 


B70 




14.1 


14.1 


14.1 


14.1 


14.1 


13.8 


13.3 


12.9 


10.9 


9.2 


C55 


A 672 


15.7 


15.7 


15.7 


15.7 


15.7 


15.3 


14.8 


14.3 


12.1 


10.2 


C55 




14.1 


14.1 


14.1 


14.1 


14.1 


13.8 


13.3 


12.9 


10.9 


9.2 


C55 




15.7 


15.7 


15.7 


15.7 


15.7 


15.3 


14.8 


14.3 


12.1 


10.2 


C55 




15.4 


15.4 


15.4 


15.4 


15.4 


14.7 


14.2 


13.7 


11.7 


9.7 


C60 


A 672 


17.1 


17.1 


17.1 


17.1 


17.1 


16.4 


15.8 


15.3 


13.0 


10.8 


C60 




15.4 


15.4 


15.4 


15.4 


15.4 


14.7 


14.2 


13.7 


11.7 


9.7 


C60 




17.1 


17.1 


17.1 


17.1 


17.1 


16.4 


15.8 


15.3 


13.0 


10.8 


C60 




16.7 


16.7 


16.7 


16.7 


16.7 


16.1 


15.6 


15.0 


12.5 


103 


C65 


A 672 


18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


17.3 


16.7 


13.9 


11.4 


C65 




16.7 


16.7 


16.7 


16.7 


16.7 


16.1 


15.6 


15.0 


12.5 


103 


C65 




18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


17.3 


16.7 


13.9 


11.4 


C65 




18.0 


18.0 


18.0 


18.0 


18.0 


17.5 


16.9 


16.3 


133 


10.8 


C70 


A 672 


20.0 


20.0 


20.0 


20.0 


20.0 


19,4 


18.8 


18.1 


143 


12.0 


C70 




18.0 


18.0 


18.0 


18.0 


18.0 


17.5 


16.9 


16.3 


133 


10.8 


C70 




20.0 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.1 


14.8 


12.0 


C70 




18.0 


18.0 


17.7 


17.6 


17.6 


17.6 


17.6 








D70 


A 672 


20.0 


20.0 


19.7 


19.5 


19.5 


19.5 


19.5 








D70 




18.0 


18.0 


17.7 


17.6 


17.6 


17.6 


17.6 








D70 




20.0 


20.0 


19.7 


19.5 


19.5 


19.5 


19.5 








D70 




20.6 


20.6 


20.3 


20.1 


20.1 


20.1 


20.1 








D80 


A 672 


22.9 


22.9 


22.6 


22.3 


22.3 


22.3 


22.3 








080 




20.6 


20.6 


20.3 


20.1 


20.1 


20.1 


20.1 








D80 




22,9 


22.9 


22.6 


22.3 


22.3 


22.3 


22.3 








D80 




19.3 


19.3 


19.3 


19.3 


19.3 


18.4 


17.8 


17.2 


14.1 


113 


N75 


A 672 


21.4 


21.4 


21.4 


21.4 


21.4 


20.4 


19.8 


19.1 


15.7 


12.6 


N75 




19.3 


19.3 


19.3 


19.3 


19.3 


18.4 


17.8 


17.2 


14.1 


113 


N75 




21.4 


21.4 


21.4 


21.4 


21.4 


20.4 


19.8 


19.1 


15.7 


12.6 


N75 




18.0 


18.0 


17.7 


17.6 


17.6 


17.6 


17.6 








CMSH-70 


A 691 


20.0 


20.0 


19.7 


19.5 


19.5 


19.5 


19.5 








CMSH-70 




18.0 


18.0 


17.7 


17.6 


17.6 


17.6 


17.6 








CMSH-70 




20.0 


20.0 


19.7 


19.5 


19.5 


19.5 


19.5 








CMSH-70 





109 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 















Specified 


Specified 
















Minimum 


Minimum 


E 


Spec. 






Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Type or Class 


Composition 


No. 


Notes 


ksi 


ksi 


F 



Electric Fusion Welded Pipe - Filler Metal Added (Cont'd) 



A 691 



CMSH-80 
CMSH-80 
CMSH-80 
CMSH-80 



10,13 
11,12 
20,23 
21,22 



C-Mn-Si 
C-Mn-Si 
C-Mn-Si 
C-Mn-Si 



(D(15) 

(DC15) 

(D(3) 
(DO) 



80 
80 
80 
80 



60 
60 
60 

60 



0.90 
1.00 
0.90 
1.00 



A 691 



CMS-75 
CMS-75 
CMS-75 
CMS-75 



10,13 
11,12 

20,23,30,33 
21,22,31,32 



C-Mn-Si 
C-Mn-Si 
C-Mn-Si 
C-Mn-Si 



(0(2) (15) 
(1X2X15) 
(0(2) 
(0(2) 



75 
75 
75 
75 



42 
42 
40 

40 



0.90 
1.00 
0.90 
1.00 



Copper Brazed Tubing 
A 254 



(1X9X10) 



42 



25 



1.00 



Plate 
A 36 



C-Mn-Si 



(0(7) (21) 



58 



36 



0.92 



A 283 



A 285 



A 299 



(A09) A 515 



A 516 



A 
B 
C 
D 

A 
B 
C 



60 
65 
70 

55 
60 
65 
70 



c 
c 
c 
c 


1 
1 
1 

1 


(0(7) 
(0(7) 
(0(7) 
(0(7) 


c 
c 
c 


1 
1 
1 


(2) 
(2) 

(2) 


C~Mn~Si 
C-Mn~Si 


1 
1 


(2X23) 
(2X22) 


C-Si 
C-Si 
C-Si 


1 
1 
1 


(2) 
(2) 
(2) 


C-Si 

C-Mn-Si 
C-Mn-Si 
C-Mn-Si 


1 
1 
1 
1 


(2) 
(2) 
(2) 
(2) 



45 


24 


0.92 


50 


27 


0.92 


55 


30 


0.92 


60 


33 


0.92 


45 


24 


1.00 


50 


27 


1.00 


55 


30 


1.00 


75 


40 


1.00 


75 


42 


1.00 


60 


32 


1.00 


65 


35 


1.00 


70 


38 


1.00 


55 


30 


1.00 


60 


32 


1.00 


65 


35 


1.00 


70 


38 


1.00 



Forgings 

A 105 



C-Si 



(2) 



70 



36 



1.00 



A 181 



60 
70 



C-Si 
C-Si 



(2) 
(2) 



60 

70 



30 
36 



1.00 
1.00 



110 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 





Maximum 


Allowable Stress Values 


in Tension, 


ksi, for Metal Temperature, °F, Not Exceeding 








-20 






















to 






















Spec. 


100 


200 


300 


400 


500 


600 


650 


700 


750 


800 


Grade 


No. 
















Electric Fusion Welded 


Pipe - 


■ Filler Metal Added (Cont'd) 


20.6 


20.6 


203 


20.1 


20.1 


20.1 


20.1 








CMSH-80 


A 691 


22.9 


22.9 


22.6 


223 


223 


22.3 


223 








CMSH-80 




20.6 


20.6 


203 


20.1 


20.1 


20.1 


20.1 








CMSH-80 




22.9 


22.9 


22.6 


223 


223 


223 


223 








CMSH-80 




193 


193 


193 


193 


193 


18.4 


17.8 


17.2 


14.1 


11.3 


CMS-75 


A 691 


21.4 


21.4 


21.4 


21.4 


21.4 


20.4 


19.8 


19.1 


15.7 


12.6 


CMS-75 




193 


193 


193 


19.3 


193 


18.4 


17.8 


17.2 


14A 


113 


CMS-75 




21.4 


21.4 


21.4 


21.4 


21.4 


20.4 


19.8 


19.1 


15.7 


12.6 


CMS-75 
























Copper Brazed Tubing 


6.0 


5.5 


4.8 


3.0 
















A 254 
Plate 


15.2 


15.2 


15.2 


15.2 


15.2 


15.2 


15.2 










A 36 



11,8 


11.8 


11.8 


11.8 


11.8 


113 


10.9 








A 


A 283 


13.1 


13.1 


13.1 


13.1 


13.1 


12.7 


123 








B 




14.5 


14,5 


14.5 


14.5 


14.5 


14.1 


13.6 








C 




15.S 


15.8 


15.8 


15.8 


15.8 


15.5 


15.0 








D 




12.9 


12.9 


12.9 


12.9 


12.9 


123 


11.9 


11.5 


10.7 


8.3 


A 


A 285 


143 


143 


143 


143 


143 


13.8 


133 


12.5 


11.0 


9.4 


B 




15.7 


15.7 


15.7 


15.7 


15.7 


15.3 


14.8 


143 


13.0 


10.8 


C 




21.4 


21.4 


21.4 


21.4 


21.4 


20.4 


19.8 


19.1 


15.7 


12.6 




A 299 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


20.8 


19.6 


15.7 


12.6 






17.1 


17.1 


17.1 


17.1 


17.1 


16.4 


15.8 


153 


13.0 


10.8 


60 


A 515 


18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


17.3 


16.7 


13.9 


11.4 


65 




20.0 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.1 


14.8 


12.6 


70 




15.7 


15.7 


15.7 


15.7 


15.7 


153 


14.8 


143 


13.0 


10.8 


55 


A 516 


17,1 


17.1 


17.1 


17.1 


17.1 


16.4 


15.8 


153 


13.0 


10.8 


60 




18.6 


18.6 


18.6 


18.6 


18.6 


17.9 


173 


16.7 


13.9 


11.4 


65 




20.0 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.1 


14.8 


12.0 


70 


Forgings 


20.0 


20.0 


20.0 


20.0 


19.6 


18.4 


17.8 


17.2 


14.8 


12.0 




A 105 



(A09) 



17.1 


17.1 


17.1 


17.1 


163 


153 


14.8 


143 


13.0 


10.8 


20.0 


20.0 


20.0 


20.0 


19.6 


18.4 


17.8 


17.2 


14.8 


12.0 



A 181 



111 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 



Spec. 
No. 



Grade 



Type or Class 



Nominal 
Composition 



P- 
No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Wrought Fittings (Seamless and Welded) 



A 234 


WPB 




WPC 


Castings 




A 216 


WCA 




WCB 




WCC 


Bars and Shapes 


A 36 




A 992 




Bolts, Nuts, 


and Studs 


A 193 





A 194 
A 307 
A 449 



1, 2, 2H 



C-Si 
C-Si 


1 
1 


(2) 
(2) 


C~Si 
C-Si 
C-Mn-Si 


1 
1 
1 


(2)(6) 
(2)(6) 
(2)(6) 


C-Mn-Si 
C-Mn-Si 


1 
1 


(D(2) 

CD (2) 

(11) 

(12) 



60 


35 


1.00 


70 


40 


1.00 


60 


30 


0.80 


70 


36 


0.80 


70 


40 


0.80 


58 


36 


1.00 


65 


50 


1.00 



(1)(13)(21) 



60 



(1)(17)(18) 


120 


92 


(1)07X19) 


105 


81 


(1)07X20) 


90 


58 



CD 
(g) 



GENERAL NOTES: 

(a) The tabulated specifications are ANSI/ASTM or ASTM, except AP! 5L For ASME Boiler and Pressure Vessel Code applications, see 
related specifications in Section II of the ASME Code. 

(b) The stress values in this Table may be interpolated to determine values for intermediate temperatures. 

(c) The P-Numbers indicated in this Table are identical to those adopted by ASME Boiler and Pressure Vessel Code. Qualification of weld- 
ing procedures, welders, and welding operators is required and shall comply with the ASME Boiler and Pressure Vessel Code (Section 
IX) except as modified by para. 127.5. 

(d) Tensile strengths and allowable stresses shown in "ksi" are "thousands of pounds per square inch." 

(e) The materials listed in this Table shall not be used at design temperatures above those for which allowable stress values are given 
except as permitted by para. 122.6.2(G). 

The tabulated stress values are 5 x E (weld joint efficiency factor) orSxF (material quality factor), as applicable. Weld joint efficiency 
factors are shown in Table 102.4.3. 

Pressure-temperature ratings of piping components, as published in standards referenced in this Code, may be used for components 
meeting the requirements of those standards. The allowable stress values given in this Table are for use in designing piping compo- 
nents which are not manufactured in accordance with referenced standards. 

(h) All the materials listed are classified as ferritic [see Table 104.1.2(A)]. 

(i) The tabulated stress values that are shown in italics are at temperatures in the range where creep and stress rupture strength govern 

the selection of stresses. 
NOTES; 

(1) THIS MATERIAL IS NOT ACCEPTABLE FOR CONSTRUCTION OF PRESSURE RETAINING PARTS OF BOILER EXTERNAL PIPING - SEE FIGS. 
100.1.2(A) AND (B). 

(2) Upon prolonged exposure to temperatures above 800°F (427°C), the carbide phase of carbon steel may be converted to graphite. 

(3) The allowable stress values given are for pipe fabricated from plate not exceeding 2 1 / 2 in. in thickness. 

(4) This material shall not be used for flammable fluids. Refer to para. 105.2.1(A). 

(5) Tensile value in parentheses is expected minimum. 

(6) The 0.80 material quality factor for casting may be increased in accordance with para. 102.4.6. 

(7) The stress values for structural quality plate include a material quality factor of 0.92. The allowable stresses for A 283 Grade D and A 
36 plate have been limited to 12.7 ksi. 



112 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-l Carbon Steel (Cont'd) 





Maximum 


Allowable Stress Values 


in Tension, 


ksi, for Metal Temperature, °F, Not Exceeding 






-20 






















to 




















Spec. 


100 


200 


300 


400 


500 


600 


650 


700 


750 


800 


Grade No. 


















Wrought Fittings (Seamless and Welded) 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


15.6 


13.0 


10.8 


WPB A 234 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.8 


18.3 


14.8 


12.0 


WPC 

Castings 


17.1 


17.1 


17.1 


17.1 


16.3 


15.3 


14.8 


14.3 


13.0 


10.8 


WCA A 216 


20.0 


20.0 


20.0 


20.0 


19.6 


18.4 


17.8 


17.2 


14.8 


12.0 


WCB 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.8 


18.3 


14.8 


12.0 


WCC 

Bars and Shapes 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16,6 


15.6 


13.0 


10.8 


A 36 


18.6 


18.6 


18.6 


18.6 


18.6 


18.6 


18.6 


16.9 


13.9 


11.4 


A 992 

Bolts, Nuts, and Studs 
A 193 



7.0 



7.0 



7.0 



7.0 



1, 2, 2H 



A 194 



A 307 



23.0 
20.2 
14.5 



23.0 
20.2 
14.5 



23.0 
20.2 

14.5 



23.0 
20.2 

14.5 



23.0 
20.2 
14.5 



23.0 
20.2 

14.5 



23.0 
20.2 

14.5 



A 449 



NOTES (Cont'd): 



(8) 
(9) 
(10) 
(11) 

(12) 



(15) 
(16) 



(18) 
(19) 
(20) 
(21) 

(22) 

(23) 



These stress values are permitted only if killed or semikilled steels are used. 

A 254 is copper brazed (not welded) steel pipe. 

For saturated steam at 250 psi (406°F), the values given for 400°F may be used. 

For A 193 alloy and stainless steel bolts for use with carbon steel piping, see Tables A-2 and A-3. 

This is a product specification. Allowable stresses are not necessary. Limitations on metal temperature for materials covered by this 

specification for use under B31.1 are: 



Grades 1 and 2 
Grade 2H 



-20°F to 600°F 
~20°F to 800°F 



be qualified in 



(13) This material shall not be used above 400°F. The allowable stress value is 7,000 psi. 

(14) This material is not listed in the ASME Boiler and Pressure Vessel Code, Section IX. However, weld procedures shall 
accordance with the P-Number shown. See para. 127.5.1. 
This material shall not be used in nominal wail thicknesses exceeding % in. 
These allowable stress values are for pipe made using a butt-weided joint process. Pipe made by other processes shall not be used. 

(17) These allowable stress values are established from a consideration of strength only and will be satisfactory for average service. For 
bolted joints, where freedom from leakage over a long period of time without retightening is required, lower stress values may be 
necessary as determined from the relative flexibility of the flange, bolts, and corresponding relaxation properties. 
These allowable stress values apply to bolting materials less than or equal to 1 in. diameter. 

These allowable stress values apply to bolting materials greater than 1 in. diameter and less than or equal to lV 2 in. 
These allowable stress values apply to bolting materials greater than l 3 / 2 in. diameter and less than or equal to 3 in. diameter. 
The allowable stress values listed in MSS SP-58 for this material may be used for pipe supporting elements designed in accordance 
with MSS SP-58. 

These values apply to material less than or equal to 1 in. thick. 
These values apply to material greater than 1 in. thick. 



113 



Copyright © 2009 by the American Society of Mechanical Engineers. 
l No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel 



Spec. 
No. 



Grade 



Type or Class 



Nominal 
Composition 



P-No. 



Notes 



Specified Specified 



Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Seamless Pipe and Tube 





A 199 


T5 

T9 




A 199 


Til 
T21 
T22 




A 213 


T2 

T5 
T5b 




A 213 


T5c 

T9 

Til 




A 213 


T12 
T21 
T22 


(A09) 




T91 


(A09) 




T91 




A 333 


3 
4 
7 
9 




A 335 


PI 

P2 
P5 
P5b 




A 335 


P5c 

P9 

Pll 




A 335 


P12 
P21 
P22 


(A09) 




P91 


(A09) 




P91 




A 369 


FP1 
FP2 
FP5 




A 369 


FP9 

FPU 



5Cr-V 2 Mo 


5B 


(1) 


60 


25 


1.00 


9Cr-lMo 


5B 


(1) 


60 


25 


1.00 


lViCr-ViMo 


4 


(1) 


60 


25 


1.00 


3Cr-lMo 


5A 


(1) 


60 


25 


1.00 


2V 4 Cr-lMo 


5A 


(D(17) 


60 


25 


1.00 


VaCr-VjMo 


3 




60 


30 


1.00 


5Cr-V 2 Mo 


5B 




60 


30 


1.00 


5Cr-y 2 Mo-iy 2 Si 


5B 




60 


30 


1.00 


5Cr-y 2 Mo-Ti 


5B 




60 


30 


1.00 


9Cr-lMo 


5B 




60 


30 


1.00 


iy 4 Cr-y 2 Mo 


4 




60 


30 


1.00 


lCr-y 2 W!o 


4 




60 


30 


1.00 


3Cr-lMo 


5A 




60 


30 


1.00 


2y 4 Cr-lMo 


5A 


(17) 


60 


30 


1.00 


9Cr-lMo-V 


15E 


(19) 


85 


60 


1.00 


9Cr-lMo-V 


15E 


(20) 


85 


60 


1.00 


3V 2 Ni 


9B 


(1) 


65 


35 


1.00 


3 / 4 Cr- 3 / 4 Ni-Cu-Al 


4 


(1) 


60 


35 


1.00 


2V 2 Ni 


9A 


(1) 


65 


35 


1.00 


2Ni-lCu 


9A 


(1) 


63 


46 


1.00 


c-y 2 Mo 


3 


(2) 


55 


30 


1.00 


y 2 cr-y 2 Mo 


3 




55 


30 


1.00 


5Cr- a / 2 Mo 


5B 




60 


30 


1.00 


5Cr-y 2 Mo~iy 2 Si 


5B 




60 


30 


1.00 


5Cr~y 2 Mo-Ti 


5B 




60 


30 


1.00 


9Cr-lMo 


5B 




60 


30 


1.00 


lyiCr-y Mo-Si 


4 




60 


30 


1.00 


lCr~y 2 Mo 


4 




60 


32 


1.00 


3Cr-lMo 


5A 




60 


30 


1.00 


2y 4 Cr-lMo 


5A 


(17) 


60 


30 


1.00 


9Cr-lMo-V 


15E 


(19) 


85 


60 


1.00 


9Cr-lMo-V 


15E 


(20) 


85 


60 


1.00 


c-y 2 Mo 


3 


(2) 


55 


30 


1.00 


y 2 Cr-y 2 Mo 


3 




55 


30 


1.00 


5Cr-y 2 Mo 


5B 




60 


30 


1.00 


9Cr-lMo 


5B 




60 


30 


1.00 


iy/ ( Cr-y 2 Mo-Si 


4 




60 


30 


1.00 



114 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 

to Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 





































Seamless Pipe 


and Tube 


16.7 


15.1 


14.5 


14.3 


14.2 


14.0 


13.8 


13.6 


13.3 


12.8 


12.3 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.3 


T5 


A 199 


16.7 


15.1 


14.5 


14.3 


14.2 


14.0 


13.8 


13.6 


13.3 


12.8 


12.3 


11.7 


10.6 


7.4 


5.0 


3.3 


2.2 


1.5 


T9 




16.7 


15.4 


14.6 


14.0 


13.5 


13.1 


12.8 


12.6 


12.3 


12.0 


11.7 


11.3 


9.3 


6.3 


4.2 


2.8 


1.9 


1.2 


Til 


A 199 


16.7 


15.6 


15.1 


15.0 


15.0 


15.0 


15.0 


15.0 


14.9 


14.8 


14.5 


12.0 


9.0 


7.0 


5.5 


4.0 


2.7 


1.5 


T21 




16.7 


15.6 


15.1 


15.0 


15.0 


15.0 


15.0 


15.0 


14.9 


14.8 


14.5 


13.6 


10.8 


8.0 


5.7 


3.8 


2.4 


1.4 


T22 




17.1 


17.1 


17.1 


17.1 


16.9 


16.4 


16.1 


15.7 


15.4 


14.9 


14.5 


13.9 


9.2 


5.9 










T2 


A 213 


17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


T5 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


T5b 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


T5c 


A 213 


17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


13.0 


10.6 


7.4 


5.0 


3.3 


2.2 


1.5 


T9 




17.1 


17,1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14.0 


13.6 


9.3 


6.3 


4.2 


2.8 






Til 




17.1 


16.8 


16.5 


16.5 


16.5 


16.3 


16.0 


15.8 


15.5 


15.3 


14.9 


14.5 


11.3 


7.2 


4.5 


2.8 






T12 


A 213 


17.1 


17.1 


16.6 


16.6 


16,6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.0 


12.0 


9.0 


7.0 


5.5 


4.0 






T21 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






T22 




24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


10.3 


7.0 


4.3 


T91 


(A09) 


24.3 


243 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


12.9 


9.6 


7.0 


4.3 


T91 


(A09) 


18.6 


18.6 


18.6 


18.6 


18.6 


17.5 


16.7 
























3 


A 333 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 
























4 




18.6 


18.6 


18.6 


18.6 


18.6 


17.5 


16.7 
























7 




18.0 




































9 




15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.4 


14.9 


14.5 
















PI 


A 335 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.4 


14.9 


14.5 


13.9 


9.2 


5.9 










P2 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


P5 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


P5b 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


P5c 


A 335 


17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


13.0 


10.6 


7.4 


5.0 


3.3 


2.2 


1.5 


P9 




17.1 


17.1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14.0 


13.6 


9.3 


6.3 


4.2 


2.8 






Pll 




17.1 


16.8 


16.5 


16.5 


16.5 


16.3 


16.0 


15.8 


15.5 


15.3 


14.9 


14.5 


11.3 


7.2 


4.5 


2.8 






PI 2 


A 335 


17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.0 


12.0 


9.0 


7.0 


5.5 


4.0 






P21 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






P22 




24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


10.3 


7.0 


4.3 


P91 


(A09) 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


12.9 


9.6 


7.0 


4.3 


P91 


(A09) 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.4 


14.9 


14.5 
















FP1 


A 369 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.4 


14.9 


14.5 


13.9 


9.2 


5.9 










FP2 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


FP5 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


13.0 


10.6 


7.4 


5.0 


3.3 


2.2 


1.5 


FP9 


A 369 


17.1 


17.1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14.0 


13.6 


9.3 


6.3 


4.2 


2.8 






FPU 





115 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel (Cont'd) 















Specified 


Specified 
















Minimum 


Minimum 


E 


Spec. 






Nominal 






Tensile, 


Yield, 


or 


No. 


Grade 


Type or Class 


Composition 


P-No. 


Notes 


ksi 


ksi 


F 


Seamless Pipe and Tube (Cont'd) 














A 369 


FP12 




lCr-V 2 Mo 


4 




60 


32 


1.00 




FP21 




3Cr-lMo 


5A 




60 


30 


1.00 




FP22 




2 a / 4 Cr-lMo 


5A 


(17) 


60 


30 


1.00 


A 714 


V 




2Ni-lCu 


9A 


(1) 


65 


46 


1.00 


Centrifugally Cast Pipe 
















A 426 


CP1 




C-V 2 Mo 


3 


CD (2) (3) (4) (7) 


65 


35 


0.85 




CP2 




l / 2 a~V 2 N\o 


3 


(D(3)(4)(7) 


60 


30 


0.85 




CP5 




50-V2M0 


5B 


(D(3) (4) (7) 


90 


60 


0.85 




CP5b 




5Cr- a / 2 Mo-Si 


5B 


(1) (3)(4)(7) 


60 


30 


0.85 


A 426 


CP9 




9Cr-lMo 


5B 


(D(3X4)(7) 


90 


60 


0.85 




CPU 




lViCr-VaMo 


4 


(1X3)(4)(7) 


70 


40 


0.85 


A 426 


CP12 




lCr-V 2 Mo 


4 


(1X3)(4)(7) 


60 


30 


0.85 




CP21 




3Cr-lMo 


5A 


(1X3)(4)(7) 


60 


30 


0.85 




CP22 




2V 4 Cr-lMo 


5A 


(1) (3) (4) (7) (17) 


70 


40 


0.85 


Electric Resistance Welded Pipe 














A 333 


3 




3V 2 Ni 


9B 


(1) 


65 


35 


0.85 




7 




2 : / 2 Ni 


9A 


(1) 


65 


35 


0.85 




9 




2Ni-lCu 


9A 


(1) 


63 


46 


0.85 



A 714 



2Ni-Cu 



9A 



(1) 



65 



46 



0.85 



Electric Fusion Welded Pipe — Filler Metal Added 

A 672 



A 672 



A 672 



A 691 



A 691 



A 691 



A 691 



L65 


20,23,30,33,40,43 


C-y 2 Mo 


3 


(1) 


65 


37 


0.90 


L65 


21,22,31,32,41,42 


C-y 2 Mo 


3 


(1) 


65 


37 


1.00 


L70 


20,23,30,33,40,43 


C-V2M0 


3 


(1) 


70 


40 


0.90 


L70 


21,22,31,32,41,42 


C- a / 2 Mo 


3 


(1) 


70 


40 


1.00 


L75 


20,23,30,33,40,43 


c~y 2 Mo 


3 


(1) 


75 


43 


0.90 


L75 


21,22,31,32,41,42 


c-y 2 Mo 


3 


(1) 


75 


43 


1.00 


CM-65 


20,23,30,33,40,43 


c-y 2 Mo 


3 


(1) 


65 


37 


0.90 


CM-65 


21,22,31,32,41,42 


c-y 2 Mo 


3 


(1) 


65 


37 


1.00 


CM-70 


20,23,30,33,40,43 


c-y 2 Mo 


3 


(1) 


70 


40 


0.90 


CM-70 


21,22,31,32,41,42 


c-y 2 Mo 


3 


(1) 


70 


40 


1.00 


CM-75 


20,23,30,33,40,43 


c~y 2 Mo 


3 


(1) 


75 


43 


0.90 


CM-75 


21,22,31,32,41,42 


c-y 2 Mo 


3 


(1) 


75 


43 


1.00 


y 2 cR 


20,23 


y 2 cr-y 2 Mo 


3 


(0(11) 


55 


33 


0.90 


ycR 


21,22 


y 2 cr-y 2 Mo 


3 


(1)(11) 


55 


33 


1.00 


y 2 cR 


20,23,30,33,40,43 


y 2 cr-y 2 Mo 


3 


(1X12) 


70 


45 


0.90 


ycR 


21,22,31,32,41,42 


y 2 cr-y 2 Mo 


3 


(D(12) 


70 


45 


1.00 



116 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and intermediate Alloy Steel (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

to Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



17.1 16.8 16.5 16.5 16.5 16.3 16.0 15.8 15.5 15.3 14.9 14.5 113 
17.1 17.1 16.6 16.6 16.6 16.6 16.6 16.6 16.6 16.6 16.0 12.0 9.0 
17.1 17.1 16.6 16.6 16.6 16.6 16.6 16.6 16.6 16.6 16.6 13.6 10.8 



7.2 4.5 2.8 
7.0 5.5 4.0 
8.0 5.7 3.8 



Seamless Pipe and Tube (Cont'd) 

FP12 A 369 

... FP21 
FP22 



18.6 



A 714 



15.8 15.8 15.8 15.8 15.8 15.8 15.8 15.6 15.2 14.8 14.4 

14.5 14.5 14.5 14.5 14.4 13.9 13.7 13.3 13.1 12.7 12.3 11.8 7.8 

21.9 21.8 21.2 21.0 20.9 20.6 20.3 19.9 19.3 18.5 12.2 93 6.8 

14.6 14.5 14.1 14.0 14.0 13.8 13.5 13.3 12.9 12.4 11.8 93 6.8 

21.9 21.8 21.2 21.0 20.9 20.7 20.3 19.9 19.3 18.5 17.7 14.0 9.4 

17.0 17.0 17.0 17.0 17.0 17.0 17.0 17.0 16.7 16.3 15.9 11.6 7.9 

14.5 14.3 14.0 13.8 13.3 12.9 12.8 12.6 12.4 12.2 11.9 11.6 9.6 

14.5 14.5 14.1 14.1 14.1 14.1 14.1 14.1 14.1 14.1 13.6 10.2 7.7 

17.0 17.0 16.7 16.5 16.4 16.3 16.2 16.0 15.7 15.2 14.6 13.4 9.7 



15.8 15.8 15.8 15.8 15.8 14.9 14.2 

15.8 15.8 15.8 15.8 15.8 14.9 14.2 

15.3 

15.8 











Centrifugally Cast Pipe 












CP1 


A 426 


5.0 










CP2 




4.9 


3.6 


2.5 


1.5 


0. 85 


CP5 




4.9 


3.6 


2.5 


1.5 


0.85 


CP5b 




63 


43 


2.8 


1.9 


13 


CP9 


A 426 


5.4 


3.6 


2.4 






cpii 




6.1 


3.8 


2 A 






CP12 


A 426 


6.0 


4.7 


3.4 






CP21 




6.6 


43 


2.7 






CP22 










Electric Resistance Welded Pipe 












3 


A 333 












7 














9 





A 714 



Electric Fusion Welded Pipe — Filler Metal Added 



16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.6 16.1 

18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.4 17.9 

18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 17.9 17.4 

20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 19.9 19.3 

19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 18.7 

21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 20.7 

16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.7 16.6 16.1 
18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.4 17,9 

18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 17.9 17.4 

20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 19.9 19.3 

19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 19.3 18.7 

21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 21.4 20.7 



14.1 14.1 14.1 14.1 14.1 14.1 14.1 14.1 14.1 14.1 13.8 12.9 83 

15.7 15.7 15.7 15.7 15.7 15.7 15.7 15.7 15.7 15.7 15.3 143 9.2 

18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 17.6 16.7 83 

20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 20.0 19.5 18.6 9.2 



53 
5.9 
53 
5.9 



L65 


A 672 


L65 




L70 


A 672 


L70 




L75 


A 672 


L75 




CM-65 


A 691 


CM-65 




OVS-70 


A 691 


CM-70 




CM-75 


A 691 


CM-75 




v 2 cr 


A 691 


y 2 cR 




v 2 cr 




v 2 cr 





117 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and intermediate Alloy Steel (Cont'd) 















Specified 


Specified 
















Minimum 


Minimum 


£ 


Spec. 






Nominal 






Tensile, 


Yield, 


or 


No. 


Grade 


Type or Class 


Composition 


P-No. 


Notes 


ksi 


ksi 


F 



Electric Fusion Welded Pipe - Filler Metal Added (Cont'd) 



A 691 


1CR 


20,23 


lCr-Y 2 Mo 




1CR 


21,22 


lCr-V 2 Mo 




1CR 


20,23,30,33,40,43 


lCr-V 2 Mo 




1CR 


21,22,31,32,41,42 


lCr-V 2 Mo 


A 691 


1V4CR 


20,23 


lV 4 Cr-Y 2 Mo-Si 




lViCR 


21,22 


lY4Cr- a / 2 Mo-Si 




lViCR 


20,23,30,33,40,43 


l 1 / 4 Cr- 1 / 2 Mo-Si 




1V4CR 


21,22,31,32,41,42 


lViCr-Vj Mo-Si 


A 691 


2Y4CR 


20,23 


2 a / 4 Cr-lMo 




2Y4CR 


21,22 


2 1 / 4 Cr-lMo 




2V 4 CR 


20,23,30,33,40,43 


2 1 / 4 Cr-lMo 




2%CR 


21,22,31,32,41,42 


2y 4 Cr-lMo 


A 691 


3CR 


20,23 


3Cr-lMo 




3CR 


21,22 


3Cr-lMo 




3CR 


20,23,30,33,40,43 


3Cr-lMo 




3CR 


21,22,31,32,41,42 


3Cr-lMo 


A 691 


SCR 


20,23 


5Cr-V 2 Mo 




5CR 


21,22 


5Cr-Y 2 Mo 




5CR 


20,23,30,33,40,43 


5Cr-V 2 Mo 




5CR 


21,22,31,32,41,42 


5Cr-V 2 Mo 


(A08/A09) A 691 


91 


40,43,50,53 


9Cr-lMo-V 


(A08/A09) 


91 


41,42,51,52 


9Cr-lMo-V 


Plate 








A 387 


2 


1 


y 2 Cr-Y 2 Mo 




2 


2 


y 2 Cr-Y 2 Mo 




5 


1 


5Cr-V 2 Mo 




5 


2 


5Cr-y 2 Mo 


A 387 


11 


1 


iy 4 Cr-V 2 Mo-Si 




11 


2 


ly^Cr-Y Mo-Si 




12 


1 


lCr-y 2 Mo 




12 


2 


lCr-y 2 Mo 


A 387 


21 


1 


3Cr-lMo 




21 


2 


3Cr-lMo 




22 


1 


2y ( Cr-lMo 




22 


2 


2YCr-lMo 


(A09) A 387 


91 


2 


9Cr-lMo~V 


(A09) 


91 


2 


9Cr-lMo-V 



4 


(D(ll) 


4 


(D(ll) 


4 


(D(12) 


4 


(D(12) 


4 


CD(ii) 


4 


CD (ID 


4 


(D(12) 


4 


(D(12) 


5A 


(1) (11X17) 


5A 


(D(ll) (17) 


5A 


(1)(12)(17) 


5A 


(D(12)(17) 


5A 


(1X11) 


5A 


(DUD 


5A 


(1)(12) 


5A 


(0(12) 


5B 


(D(ll) 


5B 


(1)(U) 


5B 


(D(12) 


5B 


(1X12) 


15E 


(0(12) 


15E 


(0(12) 


3 




3 


(1) 


5B 




5B 


(1) 


4 




4 




4 




4 




5A 




5A 




5A 


(17) 


5A 


(17) 


15E 


(19) 


15E 


(20) 



55 
55 
65 
65 

60 
60 
75 
75 

60 
60 
75 

75 

60 
60 
75 
75 

60 
60 

75 
75 

85 
85 



55 
70 
60 
75 

60 
75 
55 
65 

60 
75 
60 
75 

85 
85 



33 
33 
40 
40 

35 
35 
45 
45 

30 
30 
45 

45 

30 
30 
45 
45 

30 
30 

45 
45 

60 
60 



33 
45 
30 
45 

35 
45 
33 
40 

30 
45 
30 
45 

60 
60 



0.90 
1.00 
0.90 
1.00 

0.90 
1.00 
0.90 
1.00 

0.90 
1.00 
0.90 
1.00 

0.90 
1.00 
0.90 
1.00 

0.90 
1.00 
0.90 

1.00 

0.90 
1.00 



1.00 
1.00 
1.00 
1.00 

1.00 
1.00 
1.00 
1.00 

1.00 
1.00 
1.00 
1.00 

1.00 
1.00 



118 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A- 2 Low and Intermediate Alloy Steel (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F t Not Exceeding 

-20 

to Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



Electric Fusion Welded Pipe — Filler Metal Added (Cont'd) 



14.1 


13.9 


13.6 


13.6 


13.6 


13.6 


13.6 


13.6 


13.6 


13.6 


13.6 


13.2 


10.2 


6.5 


4.1 


2.5 






1CR 


A 691 


15.7 


15.4 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


14.7 


113 


7.2 


4.5 


2.8 






1CR 




16.7 


16.4 


16.1 


16.1 


16.1 


16.1 


16.1 


16.1 


16.1 


16.1 


16.1 


15.6 


10.2 


6.5 


4.1 


2.5 






1CR 




18.6 


18.2 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.4 


113 


7.2 


4.5 


2.8 






1CR 




15.4 


15.4 


15.4 


15.4 


15.4 


15.4 


15.4 


15.4 


15.4 


15.1 


14.7 


123 


8.4 


5.7 


3.8 


2.5 






1V4CR 


A 691 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


16.8 


16.4 


13.7 


93 


6.3 


4.2 


2.8 






1V4CR 




19.3 


19.3 


19.3 


19.3 


19.3 


19.3 


19.3 


19.3 


19.3 


19.3 


18.2 


123 


8.4 


5.7 


3.8 


2.5 






1V4CR 




21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


20.2 


13.7 


93 


63 


4.2 


2.8 






1V4CR 




15.4 


15.4 


15.0 


14.9 


14.8 


14.6 


14.4 


14.2 


14.0 


13.7 


13.4 


13.0 


103 


7.0 


4.6 


2.9 






2V4CR 


A 691 


17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






2%CR 




19.3 


19.3 


18.8 


18.6 


18.5 


18.3 


18.2 


18.0 


17.7 


17.4 


16.8 


14.2 


103 


7.0 


4.6 


2.9 






2V 4 CR 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.7 


15.8 


11.4 


7.8 


5.1 


3.2 






2V 4 CR 




15.4 


15.4 


15.0 


15.0 


15.0 


15.0 


15.0 


15.0 


15.0 


15.0 


14.4 


10.8 


8.1 


63 


5.0 


3.6 






3CR 


A 691 


17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.0 


12.0 


9.0 


7.0 


5.5 


4.0 






3CR 




19.3 


19.3 


18.8 


18.6 


18.5 


18.3 


18.2 


18.0 


17.7 


17.4 


16.3 


11.8 


8.6 


6.1 


4.4 


2.9 






3CR 




21.4 


21.4 


20.9 


20.6 


20,5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.1 


13.1 


9.5 


6.8 


4.9 


3.2 






3CR 




15.4 


15.4 


14.9 


14.8 


14.8 


14.6 


14.3 


14.0 


13.6 


13.1 


12.5 


9.8 


7.2 


5.2 


3.8 


2.6 


1.6 


0.9 


5CR 


A 691 


17.1 


17,1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


5CR 




19.3 


19.2 


18.7 


18.5 


18.5 


18.2 


17.9 


17.5 


17.0 


16.4 


12.9 


9.8 


7.2 


5.2 


3.8 


2.6 


1.6 


0.9 


5CR 




21.4 


21.4 


20.8 


20.6 


20.5 


20.2 


19.9 


19.5 


18.9 


18.2 


14.3 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


5CR 




21,9 


21.9 


21.9 


21.8 


21.7 


21.4 


21.0 


20.6 


20.0 


19.2 


18.3 


17.2 


16.0 


14.7 


12.6 


93 


63 


3.8 


91 


A 691 (A09) 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


10.3 


7.0 


43 


91 


(A09) 
Plate 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.3 


143 


9.2 


5.9 










2 


A 387 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.5 


18.6 


9.2 


5.9 










2 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


5 




21.4 


21.4 


20.8 


20.6 


20.5 


20.2 


19.9 


19.5 


18.9 


18.2 


143 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


5 




17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


16.8 


16.4 


13.7 


93 


63 


4.2 


2.8 






11 


A 387 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


21.4 


20.2 


13.7 


93 


63 


4.2 


2.8 






11 




15.7 


15.4 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


15.1 


14.7 


113 


7.2 


4.5 


2.8 






12 




18.6 


18.2 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.9 


17.4 


113 


7.2 


4.5 


2.8 






12 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.0 


12.0 


9.0 


7.0 


5.5 


4.0 






21 


A 387 


21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.1 


13.1 


9.5 


6.8 


4.9 


3.2 






21 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






22 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.7 


15.8 


11.4 


7.8 


5.1 


3.2 






22 




24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16,3 


14.0 


103 


7.0 


43 


91 


A 387 (A09) 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


12.9 


9.6 


7.0 


43 


91 


(A09) 



119 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel (Cont'd) 



Spec. 
No. 



Grade 



Type or Class 



Nominal 
Composition 



P-No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


£ 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Forgings 

A 182 



A 182 



A 336 



(A09) 
(A09) 



A 350 



Fl 
F2 
F5 
F5a 

F9 

F91 

Fll 

Fll 

F12 

F12 

F21 

F22 

F22 

Fl 

F5 

F5A 

Fll 

Fll 

F12 

F21 

F21 

F22 

F22 

F91 

F91 

LF3 
LF4 
LF5 
LF5 
LF9 



Class 1 
Ctass 2 
Class 1 
Class 2 

Class 1 
Class 3 



Class 1 
Class 2 

Class 1 
Class 3 
Class 1 
Class 3 



Class 1 
Ctass 2 



Wrought Fittings (Seamless and Welded) 



A 234 



A 234 



(A09) 
(A09) 



WP1 
WP5 

WP9 

WP11 

WP12 

WP22 
WP91 
WP91 



Class 1 
Class 1 

Class 1 



C-V 2 Mo 

y 2 cr-y 2 Mo 

5Cr-V 2 Mo 
5Cr-y 2 Mo 

9Cr-lMo 

9Cr-lMo-V 

iy 4 Cr-y 2 Mo-Si 

iy 4 Cr-y 4 Mo-Si 

lCr-y 2 Mo 

lCr-y 2 Mo 

3Cr-lMo 

2y 4 Cr-lMo 

2y 4 Cr-lMo 

c-y 2 Mo 

5Cr-y 2 Mo 

5Cr-y 2 Mo 

l 1 / 4 Cr- 1 / 2 Mo-Si 

l 1 / 4 Cr- 1 / 2 Mo-Si 

lCr-y 2 Mo 

3Cr-lMo 

3Cr~lMo 

2y 4 Cr~lMo 

2V 4 Cr-lMo 

9Cr~lMo~V 

9Cr-lMo-V 



3V 2 Ni 

3 / 4 Cr- 3 / 4 Ni-Cu- 

iy 2 Ni 
iy 2 Ni 

2NI-1CU 



C-V 2 Mo 

5Cr-y 2 Mo 
9Cr-lMo 

iycr-y 2 Mo 

lCr-y 2 Mo 

2y f Cr-lMo 
9Q-1MO-V 
9Cr-lMo-V 



Al 



3 


(2) 


3 




5B 




5B 




5B 




5B 




4 




4 




4 




4 




5A 




5A 


(17) 


5A 


(17) 


3 


(2) 


5B 




5B 




4 




4 




4 




5A 




5A 




5A 


(17) 


5A 


(17) 


15E 


(19) 


15E 


(20) 


9B 


(1) 


4 


(1) 


9A 


(1) 


9A 


(1) 


9A 


(1) 


3 


(2) 


5B 




5B 




4 




4 


(6) 


5A 


(17) 


15E 


(19) 


15E 


(20) 



70 


40 


1.00 


70 


40 


1.00 


70 


40 


1.00 


90 


65 


1.00 


85 


55 


1.00 


85 


60 


1.00 


60 


30 


1.00 


70 


40 


1.00 


60 


30 


1.00 


70 


40 


1.00 


75 


45 


1.00 


60 


30 


1.00 


75 


45 


1.00 


70 


40 


1.00 


60 


36 


1.00 


80 


50 


1.00 


60 


30 


1.00 


70 


40 


1.00 


70 


40 


1.00 


60 


30 


1.00 


75 


45 


1.00 


60 


30 


1.00 


75 


45 


1.00 


85 


60 


1.00 


85 


60 


1.00 


70 


40 


1.00 


60 




1.00 


60 


30 


1.00 


70 


37 


1.00 


63 


46 


1.00 


55 


30 


1.00 


60 


30 


1.00 


60 


30 


1.00 


60 


30 


1.00 


60 


30 


1.00 


60 


30 


1.00 


85 


60 


1.00 


85 


60 


1.00 



120 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of AS'ME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 

to Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 









































Forgings 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


19.3 
















Fl 


A 182 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20,0 


19.9 


19.3 


18.6 


9.2 


5.9 










F2 




20.0 


20.0 


19.4 


19.2 


19.2 


18.9 


18.6 


18.2 


17.6 


17.0 


14.3 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


F5 




25.7 


25.7 


24.9 


24.7 


24.6 


24.3 


23.9 


23.4 


22.7 


19.1 


14.3 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


F5a 




24.3 


24.2 


23.5 


23.4 


23.3 


22.9 


22.6 


22.1 


21.4 


20.6 


19.6 


16.4 


11.0 


7.4 


5.0 


33 


2.2 


1.5 


F9 


A 182 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


103 


7.C 


43 


F91 




17.1 


17.1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14.0 


13.6 


9.3 


63 


4.2 


2.8 






Fll 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.7 


19.2 


18.7 


13 J 


93 


63 


4.2 


2.8 






Fll 




17.1 


16.8 


16.5 


16.5 


16.5 


16.3 


16.0 


15.8 


15.5 


15.3 


14.9 


14.5 


113 


7.2 


4.5 


2.8 






F12 




20.0 


19.6 


19.2 


19.2 


19.2 


19.2 


19.2 


19.2 


19.2 


19.1 


18.6 


18.0 


113 


7.2 


4.5 


2.8 






F12 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.1 


13 A 


9.5 


6.8 


4.9 


3.2 






F21 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






F22 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.7 


15.8 


11.4 


7.8 


5.1 


3.2 






F22 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


19.3 


13.7 


8.2 


4.8 










Fl 


A 336 


17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 


1.0 


F5 




22.9 


22.8 


22.1 


22.0 


21.9 


21.6 


21.3 


20.8 


20.2 


19.1 


14.3 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 1.0 


F5A 




17.1 


17.1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14,0 


13.6 


93 


63 


4.2 


2.8 






Fll 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19,7 


19.2 


18.7 


13.7 


93 


6.3 


4.2 


2.8 






Fll 




20.0 


19.6 


19.2 


19.2 


19.2 


19.2 


19.2 


19.2 


19.2 


19.1 


18.6 


18.0 


113 


7.2 


4.5 


2.8 






F12 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.0 


12.0 


9.0 


7.0 


5.5 


4.0 


2.7 1.5 


F21 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.1 


13.1 


9.5 


6.8 


4.9 


3.2 


2. A 


1.3 


F21 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






F22 




21.4 


21.4 


20.9 


20.6 


20.5 


20.4 


20.2 


20.0 


19.7 


19.3 


18.7 


15.8 


11.4 


7.8 


5.1 


3.2 






F22 




24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


103 


7.0 43 


F91 


(A09) 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


203 


19.1 


17.8 


16.3 


12.9 


9.6 


7.0 43 


F91 


(A09) 


20.0 


20.0 


20.0 


20.0 


20.0 


18.8 


17.9 
























LF3 


A 350 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 


17.1 
























LF4 




17.1 


16.5 


15.7 


15.3 


15.3 




























LF5 




20.0 


19.2 


18.3 


17.8 


17.8 




























LF5 




18.0 




































LF9 


































Wrought Fitt 


ngs (Seamless an 


d Welded) 


15.7 


15.7 


15-7 


15.7 


15.7 


15.7 


15,7 


15.7 


15.4 


14.9 


14.5 
















WP1 


A 234 


17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


10.9 


8.0 


5.8 


4.2 


2.9 


1.8 1.0 


WP5 




17.1 


17.1 


16.6 


16.5 


16.4 


16.2 


15.9 


15.6 


15.1 


14.5 


13.8 


13.0 


10.6 


7.4 


5.0 


33 


2.2 1.5 


WP9 




17.1 


17.1 


17.1 


16.8 


16.2 


15.7 


15.4 


15.1 


14.8 


14.4 


14.0 


13.6 


93 


63 


4.2 


2.8 






WP11 




17.1 


16.8 


16.5 


16.5 


16.5 


16.3 


16.0 


15.8 


15.5 


15.3 


14.9 


14.5 


113 


72 


4.5 


2.8 






WP12 




17.1 


17.1 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


16.6 


13.6 


10.8 


8.0 


5.7 


3.8 






WP22 


A 234 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


14.0 


103 


7.0 4.3 


WP91 


(A09) 


24.3 


24.3 


24.3 


24.2 


24.1 


23.7 


23.4 


22.9 


22.2 


21.3 


20.3 


19.1 


17.8 


16.3 


12.9 


9.6 


7.0 43 


WP91 


(A09) 



121 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel (Cont'd) 



Spec. 
No, 



Grade 



Type or Class 



Nominal 
Composition 



P-No. 



Notes 



Specified 

Minimum 

Tensile, 

ksi 



Specified 

Minimum 

Yield, 

ksi 



£ 
or 
F 



Castings 



(A09) 



A 217 


WC1 




WC4 




WC5 




WC6 


A 217 


WC9 




C5 




C12 




C12A 


Bolts, Nuts, and Studs 


A 193 


B5 




B7 




B7 




B7 




B7M 


A 193 


B16 




B16 




B16 


A 194 


3 




4 




7 


A 320 


VI 




L7M 




L43 


A 354 


BC 




BC 




BD 




BD 



c-y 2 Mo 

lNi-y 2 Cr-y 2 Mo 
y 4 Ni-lMo-y 4 Cr 
l 1 / 4 Cr- 1 / 2 Mo 

2y 4 Cr-lMo 
5Cr-V 2 Mo 
9Cr-lMo 
9O-1M0-V 



5Cr-y 2 Mo 
lCr-y 5 Mo 
lCr-y 5 Mo 
lCr»y 5 Mo 
lCr-y 5 Mo 

lCr-y 2 Mo-V 
lCr-y 2 Mo-V 
lCr-y 2 Mo-V 

5Cr-y 2 Mo-V 

C-Mo 
Cr-Mo 

lCr-y 5 Mo 
lCr-y 5 Mo 
l 3 / 4 Ni- 3 /4Cr-y 4 Mo 

Alloy steel 
Alloy steel 
Alloy steel 
Alloy steel 



3 
4 
4 
4 

5A 
5B 
5B 
15E 



(2) (3) (4) 

(3) (4) 
(3) (4) 
(3) (4) 

(3) (4) 
(3) (4) 
(3) (4) 
(3) (4) 



(8)(9)(13) 

(14) 

(15) 

(16) 

(0(14) 

(14) 
(15) 
(16) 

(10) 

OHIO) 

(10) 

(D(8)(18) 

(0(14) 
(0(8)(18) 

(8)(9)(14) 

(8) (9) (15) 
(8)(9)(14) 
(8) (9) (15) 



65 
70 
70 
70 

70 
90 
90 
85 



100 
125 
115 
100 
100 

125 
110 
100 



125 

100 
125 

125 
115 
150 
140 



35 


0.80 


40 


0.80 


40 


0.80 


40 


0.80 


40 


0.80 


60 


0.80 


60 


0.80 


60 


0.80 


80 


1.00 


105 


1.00 


95 


1.00 


75 


1.00 


80 


1.00 


105 


1.00 


95 


1.00 


85 


1.00 



105 

80 

105 

109 

99 

130 

120 



1.00 
1.00 
1.00 

1.00 
1.00 
1.00 
1.00 



GENERAL NOTES: 

(a) The tabulated specifications are ANSI/ASTM or ASTM. For ASME Boiler and Pressure Vessel Code applications, see related specifica- 
tions in Section il of the ASME Code. 

(b) The stress values in this Table may be interpolated to determine values for intermediate temperatures. 

(c) The P-Numbers indicated in this Table are identical to those adopted by the ASME Boiler and Pressure Vessel Code, Section IX, except 
as modified by para. 127.5. 

(d) Tensile strengths and allowable stresses shown in "ksi" are "thousands of pounds per square inch." 

(e) The materials listed in this Table shall not be used at design temperatures above those for which allowable stress values are given. 

(f) The tabulated stress values are 5 x f (weld joint efficiency factor) or 5 x F (material quality factor), as applicable. Weld joint effi- 
ciency factors are shown in Table 102.4.3. 

(g) Pressure-temperature ratings of piping components, as published in standards referenced in this Code, may be used for components 
meeting the requirements of those standards. The allowable stress values given in this Table are for use in designing piping compo- 
nents which are not manufactured in accordance with referenced standards. 

(h) All the materials listed are classifed as ferritic [see Table 104.1.2(A)]. 

0) The tabulated stress values that are shown in italics are at temperatures in the range where creep and stress rupture strength govern 
the selection of stresses. 



122 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A- 2 Low and intermediate Alloy Steel (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 

to Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 







































Castings 


14.9 


14.9 


14.9 


14.9 


14.9 


14.9 


14.9 


14.7 


14.3 


13.9 


13.5 














WC1 


A 217 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


15.4 


12.0 


7.4 


4.7 








WC4 




16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


15.4 


13.0 


8.8 


5.5 


3.7 


2.2 




WC5 




16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


16.0 


15.8 


15.4 


15.0 


11.0 


7.4 


5.0 


3.4 


2.2 




WC6 




16.0 


16.0 


15.8 


15.5 


15.4 


15.4 


15.3 


15.0 


14.8 


14.3 


13.8 


12.6 


9.1 


6.2 


4.1 


2.6 




WC9 


A 217 


20.6 


20.6 


19.9 


19.8 


19.7 


19.4 


19.1 


18.7 


18.2 


15.3 


11.4 


8.7 


6.4 


4.6 


3.4 


2.3 1.4 


0.8 


C5 




20.6 


20.6 


19.9 


19.8 


19.7 


19.4 


19.1 


18.7 


18.2 


17.4 


16.6 


13 A 


8.8 


5.9 


4.0 


2.6 1.8 


1.2 


C12 




19.4 


19.4 


19.4 


19.4 


19.3 


19.0 


18.7 


18.3 


17.7 


17.1 


16.2 


15.3 


14.2 


13.0 


11.2 


8.2 5.6 


3.4 


C12A 




































Bolts, Nuts, 


and Studs 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


18.5 


14.5 


10.4 


7.6 


5.6 


4.2 


3.1 2.0 


13 


B5 


A 193 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


23.6 


21.0 


16.3 


12.5 


8.5 


4.5 








B7 




23.0 


23.0 


23,0 


23.0 


23.0 


23.0 


23.0 


23.0 


22.2 


20.0 


163 


12.5 


8.5 


4.5 








B7 




18.8 


18.8 


18.8 


18.8 


18.8 


18,8 


18.8 


18.8 


18.8 


18.0 


163 


12.5 


8.5 


4.5 








B7 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


18.5 


16.3 


12.5 


8.5 


4.5 








B7M 




25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


23.5 


20.5 


16.0 


11.0 


63 


2.8 




B16 


A 193 


22.0 


22.0 


22.0 


22.0 


22.0 


22.0 


22.0 


22.0 


22.0 


22.0 


21.0 


18.5 


15.3 


11.0 


6.3 


2.8 




B16 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


18.8 


16.7 


143 


11.0 


63 


2.8 




B16 

3 
4 
7 

17 


A 194 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 




















A 320 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


18.5 


163 


12.5 


8.5 


4.5 








L7M 




25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 




















L43 




25.0 


25.0 


25.0 


25.0 


25.0 


25.0 


25.0 






















BC 


A 354 


23.0 


23.0 


23.0 


23.0 


23.0 


23.0 


23.0 






















BC 




30.0 


30.0 


30.0 


30.0 


30.0 


30.0 


30.0 






















BD 




28.0 


28.0 


28.0 


28.0 


28.0 


28.0 


28.0 






















BD 





(A09) 



NOTES: 

(1) THIS MATERIAL IS NOT ACCEPTABLE FOR USE ON BOILER EXTERNAL PIPING - SEE FIGS. 100.1.2(A) AND (B). 

(2) Upon prolonged exposure to temperature above 875°F, the carbide phase of carbon-molybdenum steel may be converted to graphite. 

(3) These allowable stress values apply to normalized and tempered material only. 

(4) The material quality factors and allowable stress values for these materials may be increased in accordance with para. 102.4.6. 

(5) DELETED 

(6) If A 234 Grade WP-12 fittings are made from A 387 Grade 12 annealed plate, the allowable stress values shall be reduced by the 
ratio of 55 divided by 60 in the temperature range — 20°F through 850°F. At 900°F through 1,100°F, the values shown may be used. 

(7) The mutual quality factor for centrifugally cast pipe (0.85) is based on all surfaces being machined, after heat treatment, to a surface 
finish of 250 (xin. arithmetic average deviation or better. 

(8) These allowable stress values are established from a consideration of strength only and will be satisfactory for average service. For 
bolted joints, where freedom from leakage over a long period of time without retightening is required, lower stress values may be 
necessary as determined from the relative flexibility of the flange and bolts and corresponding relaxation properties. 



123 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-2 Low and Intermediate Alloy Steel (Cont'd) 

NOTES: 
(9) Between temperatures of — 20°F and 400°F, allowable stress values equal to the lower of the following may be used: 20% of the 
specified tensile strength, or 25% of the specified yield strength. 

(10) This is a product specification. Allowable stress values are not necessary. Limitations on metal temperature for materials covered by 
this specification for use under ASME B31.1 are: 

Grade 3 -20°F to 1,100°F 

Grade 4 -20°Fto 900°F 

Grade 7 -2Q°F to 1,100°F 

(11) These allowable stress values are for pipe fabricated from A5TM A 387 Class 1 plate in the annealed condition. 

(12) These allowable stress values are for pipe fabricated from ASTM A 387 Class 2 plate. 

(13) These allowable stress values apply to bolting materials 4 in. in diameter and smaller. 

(14) These allowable stress values apply to bolting materials 2 : / 2 in, and smaller. 

(15) These allowable stress values apply to bolting materials larger than 2 l / 2 in. but not larger than 4 in. in diameter. 

(16) These allowable stress values apply to bolting materials larger than 4 in. but not larger than 7 in. in diameter. 

(17) For use at temperatures above 850°F, the carbon content of the base material and, where applicable, weld filler metal shall be 
0.05% or higher. See para. 124.2(D). 

(18) Minimum tempering temperature shall be 800°F. 

(19) These allowable stress values apply to thickness less than 3 in. 

(20) These allowable stress values apply to thickness 3 in. or greater. 



124 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 





































Seamless Pipe 


and Tube 






































Au5tenitic 


20.0 


16.7 


15-0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6 A 


TP304 


A 213 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


TP304 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


TP304H 




20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6 A 


TP304H 




16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















TP304L 


A 213 


16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















TP304L 




22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6 A 


TP304N 




22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6 A 


TP304N 




24.9 


24.7 


22.0 


19.9 


18,5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 213 


24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


20.3 


20.0 


19,1 


14.9 


11.6 


9.0 


6.9 


5.2 






20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


16.9 


13.8 


10.3 


7.6 


5.5 


4.0 


TP309H 


A 213 


20.0 


17.5 


16.1 


15.1 


14.4 


13.9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


10.3 


7.6 


5.5 


4.0 


TP309H 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


16.7 


13.8 


10.3 


7.6 


5.5 


4.0 


TP310H 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


12.1 


10.3 


7.6 


5.5 


4.0 


TP310H 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316 


A 213 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15,7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316H 




20.0 


20.0 


20.0 


19,3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316H 




16.7 


14.1 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


8.9 


8.8 


8.0 


7.9 


6.5 


6.4 


TP316L 


A 213 


16.7 


16.7 


16.0 


15.6 


14.8 


14.0 


13.8 


13.5 


13.2 


13,0 


12.7 


12.4 


12.0 


11.9 


10.8 


10.2 


8.8 


6.4 


TP316L 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


TP316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


123 


9.8 


7.4 


TP316N 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12,4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


TP321 


A 213 


20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


TP321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


TP321H 




20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


123 


9 A 


6.9 


5.4 


TP321H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


TP347 


A 213 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6 A 


4.4 


TP347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


TP347H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14.1 


10.5 


7.9 


TP347H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6 A 


4.4 


TP348 


A 213 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6 A 


4.4 


TP348 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


TP348H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14.1 


10.5 


7.9 


TP348H 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6 A 


TP304 


A 312 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6 A 


TP304 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6 A 


TP304H 




20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6 A 


TP304H 





127 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Spec. 
No. 



Type or 
Grade 



Class 



UNS 






Alloy 


Nominal 


P- 


No. 


Composition 


No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Seamless Pipe and Tube (Cont'd) 
Austenitic (Cont'd) 



A 312 


TP304L 


S30403 


18Cr-8Ni 




TP304L 


S30403 


18Cr-8Ni 




TP304N 


S30451 


18Cr-8Ni-N 




TP304N 


S30451 


18Cr-8Ni-N 


A 312 




S30815 


21Cr-llNi-N 






S30815 


21Cr-llNi-N 


A 312 


TP309H 


S30909 


23Cr-12Ni 




TP309H 


S30909 


23Cr-12Ni 




TP310H 


S31009 


25Cr-20Ni 




TP310H 


S31009 


25Cr-20Ni 


A 312 


TP316 


S31600 


16Cr-12Ni-2Mo 




TP316 


S31600 


16Cr-12Ni-2Mo 




TP316H 


S31609 


16Cr-12Ni-2Mo 




TP316H 


S31609 


16Cr-12Ni-2Mo 


A 312 


TP316L 


S31603 


16Cr-12Ni-2Mo 




TP316L 


S31603 


16Cr-12Ni-2Mo 




TP316N 


S31651 


16Cr-12Ni-2Mo-N 




TP316N 


S31651 


16Cr-12Ni-2Mo-N 


A 312 


TP317 


S31700 


18Cr-13Ni-3Mo 




TP317 


S31700 


18Cr-13Ni~3Mo 




TP321 


S32100 


lSCr-10Ni™Ti 




TP321 


S32100 


18Cr-10Ni-Ti 




TP321H 


S32109 


18Cr-10Ni-Ti 




TP321H 


S32109 


18Cr-10Ni-Ti 


A 312 


TP347 


S34700 


18Cr-10Ni-Cb 




TP347 


S34700 


18Cr--10Ni-Cb 




TP347H 


S34709 


18Cr-10Ni~-Cb 




TP347H 


S34709 


18Cr-10Ni-Cb 


A 312 


TP348 


S34800 


18Cr-10Ni-Cb 




TP348 


S34800 


18Cr-10Ni-Cb 




TP348H 


S34809 


18Cr-10Ni~Cb 




TP348H 


S34809 


18Cr-10Ni-Cb 


A 312 


TPXM-15 


S3810O 


18Cr-18Ni-2Si 




TPXM-15 


S38100 


18Cr-18Ni-2Si 




TPXM-19 


S20910 


22Cr-13Ni-5Mn 




TPXM-19 


S20910 


22Cr-13Ni-5Mn 


(A09) 




S31254 


20Cr-18Ni-6Mo 


(A09) 




S31254 


20Cr-18Ni-6Mo 



(1) 

(D(9) 
(10) 
(9) (10) 

(1) 

(D(9) 

(9) 
(9) 



(10) 
(9)(10) 

(9) 

(1) 

(D(9) 
(10) 
(9) (10) 

(1)(10) 
(1)(9)(10) 

(10) 
(9) (10) 

(9) 

(10) 
(9)(10) 

(9) 

(10) 
(9)(10) 

(9)' 

(1) 

CD (9) 

(l) 

(D(9) 

(1) 

(D(9) 



70 


25 


1.00 


70 


25 


1.00 


80 


35 


1.00 


80 


35 


1.00 


87 


45 


1.00 


87 


45 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


70 


25 


1.00 


70 


25 


1.00 


80 


35 


1.00 


80 


35 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


100 


55 


1.00 


100 


55 


1.00 


95 


45 


1.00 


95 


45 


1.00 



128 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



A5ME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



































Seamless Pipe and Tube (Cont'd) 




































Austenitic (Cont'd) 


16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















TP304L 


A 312 


16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















TP304L 




22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


TP304N 




22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


163 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


TP304N 




24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 312 


24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


20.3 


20.0 


19.1 


14.9 


11.6 


9.0 


6.9 


5.2 






20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


16.9 


13.8 


10.3 


7.6 


5.5 


4.0 


TP309H 


A 312 


20.0 


17.5 


16.1 


15.1 


14,4 


13.9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


10.3 


7.6 


5.5 


4.0 


TP309H 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


16.7 


13.8 


10.3 


7.6 


5.5 


4.0 


TP310H 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


12.1 


10.3 


7.6 


5.5 


4.0 


TP310H 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316 


A 312 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316H 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316H 




16.7 


14.2 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 
















TP316L 


A 312 


16.7 


16.7 


16.7 


15.7 


14.8 


14.0 


13.7 


13.5 


13.2 


12.9 


12.7 
















TP316L 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


TP316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


TP316N 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP317 


A 312 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP317 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


TP321 




20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16,5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


TP321 




20.0 


18.0 


16.5 


15.3 


14,3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


TP321H 




20.0 


20.0 


19.1 


18.7 


18,7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


12.3 


9.1 


6.9 


5.4 


TP321H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13,5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


TP347 


A 312 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


TP347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


TP347H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14. 1 


10.5 


7.9 


TP347H 




20.0 


18.4 


17.1 


16.0 


15.0 


14,3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


TP348 


A 312 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


TP348 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


TP348H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14.1 


10.5 


7.9 


TP348H 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11,2 


11.0 


10.8 


10.6 


10.4 










TPXM-15 


A 312 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


10.6 


10.4 










TPXM-15 




28.6 


28.4 


26.9 


26.0 


25.5 


25.0 


24.6 


24.2 


23.9 


23.5 


23.3 


23.0 


22.7 


22.5 


22.2 








TPXM-19 




28.6 


28.4 


26.9 


26.0 


25,5 


25.1 


24.9 


24.7 


24.5 


24.2 


23.9 


23.6 


23.2 


22.8 


22.3 








TPXM-19 




27.1 


27.1 


25,8 


24,6 


23.7 


23.2 


23.1 


23.0 


22.9 






















(A09) 


27.1 


24.5 


21.9 


20.2 


19.1 


18.3 


18.0 


17.8 


17.7 






















(A09) 



129 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 















Specified 


Specified 








UNS 








Minimum 


Minimum 


£ 


Spec. 


Type or 


Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade Class No. 


Composition 


No. 


Notes 


ksi 


ksi 


F 


Seamless Pipe and Tube (Cont'd) 














Austenitic (Cont'd) 
















A 376 


TP304 


S30400 


18Cr-8Ni 


8 


(10) 


75 


30 


1.00 




TP304 


S30400 


18Cr-8Ni 


8 


(9) (10) 


75 


30 


1.00 




TP304H 


S30409 


18Cr-8Ni 


8 




75 


30 


1.00 




TP304H 


S30409 


18Cr-8Ni 


8 


(9) 


75 


30 


1.00 




TP304N 


530451 


18Cr-8Ni-N 


8 


(10) 


80 


35 


1.00 




TP304N 


S30451 


18Cr-8Ni-N 


8 


(9)(10) 


80 


35 


1.00 


A 376 


TP316 


531600 


16Cr-12Ni-2Mo 


8 


(10) 


75 


30 


1.00 




TP316 


531600 


16Cr-12Ni-2Mo 


8 


(9) (10) 


75 


30 


1.00 




TP316H 


S31609 


16Cr-12Ni-2Mo 


8 




75 


30 


1.00 




TP316H 


531609 


16Cr-12Ni-2Mo 


8 


(9) 


75 


30 


1.00 




TP316N 


531651 


16Cr-12Ni-2Mo-N 


8 


(10) 


80 


35 


1.00 




TP316N 


531651 


16Cr-12Ni-2Mo-N 


8 


(9) (10) 


80 


35 


1.00 


A 376 


TP321 


532100 


18Cr-10Ni-Ti 


8 


(10) 


75 


30 


1.00 




TP321 


532100 


18Cr-10Ni-Ti 


8 


(9) (10) 


75 


30 


1.00 




TP321H 


S32109 


18Cr-10Ni-Ti 


8 




75 


30 


1.00 




TP321H 


S32109 


18Cr-10Ni-Ti 


8 


(9) 


75 


30 


1.00 


A 376 


TP347 


S34700 


18Cr-10Ni-Cb 


8 


(10) 


75 


30 


1.00 




TP347 


S34700 


18Cr~10Ni-Cb 


8 


(9) (10) 


75 


30 


1.00 




TP347H 


S34709 


18Cr-10NI~Cb 


8 




75 


30 


1.00 




TP347H 


S34709 


18Cr-10Ni-Cb 


8 


(9) 


75 


30 


1.00 


A 376 


TP348 


534800 


18Cr-10Ni-Cb 


8 


(10) 


75 


30 


1.00 




TP348 


S34800 


18Cr-10Ni-Cb 


8 


(9X10) 


75 


30 


1.00 


A 430 


FP304 


S30400 


18Cr-8Ni 


8 


(10)(11) 


70 


30 


1.00 




FP304 


S30400 


18Cr-8Ni 


8 


(9)(10)(11) 


70 


30 


1.00 




FP304H 


S30409 


18Cr-8Ni 


8 




70 


30 


1.00 




FP304H 


S30409 


18Cr-8Ni 


8 


(9) 


70 


30 


1.00 




FP304N 


S30451 


18Cr-8Ni-N 


8 


(10) 


75 


35 


1.00 




FP304N 


S30451 


18Cr-8Ni-N 


S 


(9) (10) 


75 


35 


1.00 


A 430 


FP316 


S31600 


l6Cr-12Ni-2Mo 


8 


(10) (11) 


70 


30 


1.00 




FP316 


S31600 


16Cr-12Ni-2Mo 


8 


(9)(10)(11) 


70 


30 


1.00 




FP316H 


531609 


l6Cr-12Ni-2Mo 


8 




70 


30 


1.00 




FP316H 


S31609 


l6Cr-12Ni~2Mo 


8 


&) 


70 


30 


1.00 




FP316N 


S31651 


16Cr-12Ni~2Mo~N 


8 


(10) 


75 


35 


1.00 




FP316N 


S31651 


16Cr-12Ni-2Mo-N 


8 


(9) (10) 


75 


35 


1.00 


A 430 


FP321 


532100 


ISCr-lONi-Ti 


8 


(10X11) 


70 


30 


1.00 




FP321 


S32100 


18Cr-10Ni-Ti 


8 


(9) (10) (11) 


70 


30 


1.00 




FP321H 


S32109 


18Cr-10Ni-Ti 


8 




70 


30 


1.00 




FP321H 


S32109 


18Cr-10Ni~Ti 


8 


(9) 


70 


30 


1.00 


A 430 


FP347 


534700 


18Cr-10Ni~Cb 


8 


(10) (11) 


70 


30 


1.00 




FP347 


S34700 


18Cr-10Ni-Cb 


8 


(9) (10) (11) 


70 


30 


1.00 




FP347H 


S34709 


18Cr-10Ni-Cb 


8 




70 


30 


1.00 




FP347H 


534709 


18Cr-10Ni-Cb 


8 


(9) 


70 


30 


1.00 


A 789 




S32550 


25.5Cr-5.5Ni-3.5Mo-2Gi 


10H 


(1)05) (3 6) 


110 


80 


1.00 


A 790 




S32550 


25.5Cr-5.5Ni-3.5Mo-2Cu 


10H 


(1)05) (36) 


110 


80 


1.00 



130 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



































Seamless Pipe and Tube (Cont'd) 




































Austenitic (Cont'd) 


20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


TP304 


A 376 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


TP304 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


TP304H 




20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


TP304H 




22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


TP304N 




22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


TP304N 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316 


A 376 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316H 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316H 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13,9 


13.7 


13.4 


13,2 


12.9 


12.3 


9.8 


7.4 


TP316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


TP316N 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


TP321 


A 376 


20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


TP321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


TP321H 




20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16,4 


16.2 


123 


9.1 


6.9 


5 A 


TP321H 




20,0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


TP347 


A 376 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


TP347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


TP347H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14.1 


10.5 


7.9 


TP347H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


TP348 


A 376 


20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


TP348 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


FP304 


A 430 


20.0 


18.9 


17.7 


17.1 


16.9 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


FP304 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


FP304H 




20.0 


18.9 


17.7 


17.1 


16.9 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


FP304H 




21.4 


19.1 


16.7 


15.1 


14.0 


133 


13.0 


12.8 


12,5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


FP304N 




21.4 


21.4 


20.4 


19.6 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


FP304N 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


FP316 


A 430 


20.0 


20.0 


19.4 


19.2 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


FP316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


FP316H 




20.0 


20.0 


19.4 


19.2 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


FP316H 




21.4 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


FP316N 




21.4 


21.4 


20.6 


20.1 


19,9 


19.9 


19.9 


19.9 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


FP316N 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


FP321 


A 430 


20.0 


19.0 


17.8 


17.5 


17,5 


17.5 


17.5 


17.5 


17,2 


16.9 


16.7 


16.5 


16.4 


14.9 


9.6 


6.9 


5.0 


3.6 


FP321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


FP321H 




20.0 


19.0 


17.8 


17.5 


17,5 


17.5 


17.5 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


12.3 


9.1 


6.9 


5 A 


FP321H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


FP347 


A 430 


20.0 


19.1 


17.6 


16.6 


16.0 


15.8 


15.7 


15.7 


15.7 


15.7 


15.7 


15.6 


15.5 


15.3 


12.1 


9.1 


6.1 


4 A 


FP347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


FP347H 




20.0 


19.1 


17.6 


16.6 


16.0 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.6 


15.5 


15.3 


15.1 


14.1 


10.5 


7.9 


FP347H 




31.4 


31.3 


29.5 


28.6 


28.2 






























A 789 


31.4 


31.3 


29.5 


28.6 


28.2 






























A 790 



131 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 

















Specified 


Specified 










UNS 








Minimum 


Minimum 


f 


Spec. 


Type or 




Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Class 


No. 


Composition 


No. 


Notes 


ksi 


ksi 


F 



Seamless Pipe and Tube (Cont'd) 
Ferritic/Martensitic 



A 268 



TP405 
TP410 
TP429 
TP430 

TPXM-27 
TP446-1 
TPXM-33 

TPXM-27 
TPXM-33 

Ferritic/Austenitic 



A 731 



(A08) 
(A08) 

(A08) 
(A08) 



A 789 



A 790 



S31803 
S32205 
S32750 

S31803 
S32205 
S32750 



Centrifugally Cast Pipe 
Austenitic 

A 451 CPF8 
CPF8 
CPF8C 
CPF8C 

CPF8M 
CPF8M 

A 451 CPH8 
CPH8 
CPH10 
CPH10 

A 451 CPH20 
CPH20 
CPK20 
CPK20 



(A09) 



540500 


12Cr-Al 




541000 


13Cr 




S42900 


15Cr 




S43000 


17Cr 




544627 


26Q-1MO 




S44600 


27Cr 




544626 


27Cr~lMo-Ti 




S44627 


27Cr-lMo 




S44626 


27Cr-lMo-Ti 




531803 


22Cr-5.5Ni-3Mo- 


N 


S32205 


22Cr-5,5Ni-3Mo- 


N 


532750 


25Cr-7Ni-4Mo-N 




531803 


22Cr-5.5Ni-3Mo- 


N 


532205 


22Cr-5.5Ni-3Mo- 


N 


532750 


25Cr-7Ni-4Mo-N 





J92600 


18Cr-8Ni 


J92600 


18Cr-8Ni 


J92710 


18Cr-10Ni-Cb 


J92710 


18Cr~-10Ni~Cb 


J92900 


18Cr-9Ni-2Mo 


J92900 


18Cr-9Ni-2Mo 


J93400 


25Cr-12Ni 


J93400 


25Cr-12Ni 


J93410 


25Cr-12Ni 


J93410 


25Cr-12Ni 


J93402 


25Cr-12Ni 


J93402 


25Cr-12Ni 


J94202 


25Cr-20Ni 


J94202 


25Cr-20Ni 



Welded Pipe and Tube — Without Filler Metal 
Austenitic 



A 249 



A 249 



TP304 
TP304 
TP304H 
TP304H 

TP304L 
TP304L 
TP304N 
TP304N 



S30400 


18Cr-SNi 




530400 


ISCr-SNt 




S30409 


ISCr-SNi 




S30409 


ISCr-SNi 




S30403 


18Cr~8Ni 




S30403 


18Cr-8Ni 




530451 


18Cr-8Ni- 


-N 


S30451 


18Cr-8Ni- 


-N 



7 


(3) 


60 


30 


1.00 


6 




60 


30 


1.00 


6 


(3)' 


60 


35 


1.00 


7 


(3) 


60 


35 


1.00 


10! 


(D(2) 


65 


40 


1.00 


10! 




70 


40 


1.00 


10! 


(2)' 


68 


45 


1.00 


10! 


(2) 


65 


40 


1.00 


10! 


(2) 


65 


40 


1.00 


10H 


(0(33X34) 


90 


65 


1.00 


10H 


(1X33X34) 


95 


70 


1.00 


10H 


(0(33X39) 


116 


80 


1.00 


10H 


(0(33X34) 


90 


65 


1.00 


10H 


(0(33X34) 


90 


65 


1.00 


10H 


(0(33X39) 


116 


80 


1.00 


8 


(O(8)(10)(26) 


70 


30 


0.85 


8 


(0(8X9X10X26) 


70 


30 


0.85 


8 


(0(8X10X26) 


70 


30 


0.85 


8 


(0(8) (9) (10) (26) 


70 


30 


0.85 


8 


(1)(8)(13)(26) 


70 


30 


0.85 


8 


(0(8X9X13X26) 


70 


30 


0.85 


8 


(1)(8)(10)(26) 


65 


28 


0.85 


8 


(1)(8)60(10)(26) 


65 


28 


0.85 


8 


(0(6) (8) (10) (26) 


(70) 


30 


0.85 


8 


(1X6)(8X9)(10)(26) 


(70) 


30 


0.85 


8 


(1X6X8X10X26) 


(70) 


30 


0.85 


8 


(1)(6)(8)(9)(10)(26) 


(70) 


30 


0.85 


8 


(0(8) (10) (2 6) 


65 


28 


0.85 


8 


(0(8) (9) (10) (26) 


65 


28 


0.85 



(10) 
(9X10) 

(9) 
(0 

(0(9) 

(10) 

(9X10) 



75 


30 


0.85 


75 


30 


0.85 


75 


30 


0.85 


75 


30 


0.85 


70 


25 


0.85 


70 


25 


0.85 


80 


35 


0.85 


80 


35 


0.85 



132 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



Seamless Pipe and Tube (Cont'd) 
Ferritfc/Martensitic 



17.1 


17.1 


16.8 


16.5 


16.3 


15.9 


15.6 


15.2 


















TP405 


A 268 




17.1 


17.1 


16.8 


16.5 


16.3 


15.9 


15.6 


15.2 


















TP410 






17.1 


17.1 


16.8 


16.5 


16.3 


15.9 


15.6 


15.2 


















TP429 






17.1 


17.1 


16.8 


16.5 


16.3 


15.9 


15.6 


15.2 


















TP430 






18.6 


18.6 


18.3 


18.1 


18.1 


18.1 


18.1 




















TPXM-27 






20.0 


20.0 


19.3 


18.8 


18.4 


17.9 


17.7 




















TP446-1 






19.4 


19.4 


193 


19.0 


18.8 


18.4 


18.1 




















TPXM33 






18.6 


18.6 


18.3 


18.1 


18.1 


18.1 


18.1 




















TPXM-27 


A 731 




18.6 


18.6 


18.4 


18.2 


18.0 


17.6 


17.3 




















TPXM33 






































F erritic/Austenitic 




25.7 


25.7 


24.8 


23.9 


23.3 


23.1 






















S31803 


A 789 




27.1 


27.1 


26.2 


25.2 


24.6 


24.3 






















S32205 




(A08) 


33.1 


33.0 


31.2 


30.1 


29.6 


29.4 






















S32750 




(A08) 


25.7 


25.7 


24.8 


23.9 


23.3 


23.1 






















S31803 


A 790 




25.7 


25.7 


24.8 


23.9 


23.3 


23.1 






















S32205 




(A08) 


33.1 


33.0 


31.2 


30.1 


29.6 


29.4 






















S32750 




(A08) 
































Centrifugally Cast Pipe 




































Austenitic 




17.0 


14.2 


12.7 


11.7 


11.0 


10.5 


10.2 


9.9 




9.8 


9.5 


9.4 9.2 9.0 8.8 


8.1 


6.4 


5.1 


4.1 


CPF8 


A 451 




17.0 


16.1 


15.0 


14.5 


14.4 


14.1 


13.8 


13.4 


13.2 12.9 12.7 12.4 12.2 10.4 


8.1 


6.4 


5.1 


4.1 


CPF8 






17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 




9.8 


9.5 


9.4 9.2 9.0 8.8 


8.6 


7.8 


5.2 


3.8 


CPF8C 






17.0 


16.1 


15.0 


14.5 


14.4 


14.1 


13.8 


13.5 


13.2 12.9 12.6 12.4 12.1 11.9 


10.3 


7.8 


5.2 


3.8 


CPF8C 






17.0 


14.6 


13.2 


12.1 


11,3 


10.7 


10.4 


10.3 


10.1 10.0 


9.9 9.8 9.7 9.6 


9.5 


7.6 


53 


4.6 


CPF8M 






17.0 


17.0 


16.5 


16.3 


15.2 


14.4 


14.1 


13.8 


13.6 13.5 133 13.2 13.1 12.6 


9.8 


7.6 


5.9 


4.6 


CPF8M 






15.8 


13.0 


12.0 


11.5 


11.1 


10.8 


10.5 


103 


10.0 


9J 


9.4 9.1 8.7 8.4 


7.2 


5.5 


4.3 


3.2 


CPH8 


A 451 




15.8 


14.4 


13.4 


13.1 


13.1 


13.1 


13.0 


12.9 


12.8 12.5 12.2 11.8 113 9.4 


7.2 


5.5 


4.3 


3.2 


CPH8 






17.0 


13.9 


12.8 


12.3 


11.9 


11.5 


11.3 


11.0 


10.7 10.4 10.0 9.7 7.8 5.0 


3.2 


2.1 


1.3 


0.85 


CPH10 






17.0 


15.6 


14.5 


14.1 


14.1 


14.1 


14.0 


13.9 


13.8 13.5 13.1 12.7 7.8 5.0 


3.2 


2.1 


1.3 


0.85 


CPH10 






17.0 


13.9 


12.8 


12.3 


11.9 


11.5 


11.3 


11.0 


10.7 10.4 10.0 9.7 9A 9.0 


7.2 


5.5 


4.3 


3.2 


CPH20 


A 451 




17.0 


15.6 


14.5 


14.1 


14.1 


14.1 


14.0 


13.9 


13.8 13.5 13.1 12.7 12.1 9.4 


7.2 


5.5 


4.3 


3.2 


CPH20 






15.8 


13.0 


12.0 


11.5 


11.1 


10.8 


10.5 


103 


10.0 


9.7 


9.4 9.1 8.7 8.4 


8.1 


7.2 


6.2 


5.1 


CPK20 






15.8 


14.4 


13.4 


13.1 


13.1 


13.1 


13.0 


12.9 


12.8 12.5 12.2 11.8 11.3 9.6 


8.3 


7.2 


6.2 


5.1 


CPK20 




(A09) 



17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


8.3 


6.6 


5.2 


TP304 


17.0 


17.0 


16.1 


15.5 


14.8 


14.1 


13.8 


13.5 


13.2 


12.9 


12.6 


12.4 


12.1 


11.9 


10.5 


8.3 


6.6 


5.2 


TP304 


17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


8.3 


6.6 


5.2 


TP304H 


17.0 


17.0 


16.1 


15.5 


14.8 


14.1 


13.8 


13.5 


13.2 


12.9 


12.6 


12.4 


12.1 


11.9 


10.5 


8.3 


6.6 


5.2 


TP304H 


14.2 


12.1 


10.9 


9.9 


9.3 


8.8 


8.6 


8.5 


83 


8.2 


















TP304L 


14.2 


14.2 


14.2 


13.4 


12.5 


11.9 


11.7 


11.4 


113 


11.1 


















TP304L 


19.4 


16.2 


14.2 


12.8 


11.9 


113 


11.0 


10.8 


10.6 


10.5 


103 


10.0 


9.8 


9.6 


9.4 


8.3 


6.6 


5.2 


TP304N 


19.4 


19.4 


18.5 


173 


16.0 


15.2 


14.9 


14.6 


14.4 


14.1 


13.8 


13.6 


133 


13.0 


10.5 


8.3 


6.6 


5.2 


TP304N 



Welded Pipe and Tube - Without Filler Metal 
Austenitic 

A 249 



A 249 



133 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 









UNS 






Spec. 


Type or 




Alloy 


Nominal 


P- 


No. 


Grade 


Class 


No. 


Composition 


No 



Notes 



Specified Specified 

Minimum Minimum E 

Tensile, Yield, or 

ksi ksi F 



Welded Pipe and Tube - Without Filler Metal (Cont'd) 
Austenitic (Cont'd) 

A 249 



A 249 



A 249 



A 249 



A 249 



A 249 



A 249 



A 249 



A 312 



A 312 



A 312 





S30815 


21Cr-llNi-N 




530815 


21Cr-llNi-N 


TP309H 


S30909 


23Cr-12Ni 


TP309H 


S30909 


23Cr-12Ni 


TP316 


S31600 


16Cr-12Ni-2Mo 


TP316 


S31600 


16Cr-12Ni-2Mo 


TP316H 


S31609 


16Cr-12Ni-2Mo 


TP316H 


S31609 


16Cr-12Ni-2Mo 


TP316L 


S31603 


16Cr-12Ni-2Mo 


TP316L 


S31603 


16Cr-12Ni-2Mo 


TP316N 


$31651 


16Cr-12Ni-2Mo-N 


TP316N 


S31651 


16Cr-12Ni-2Mo-N 


TP317 


531700 


18Cr-13Ni-3Mo 


TP317 


531700 


18Cr-13Ni-3Mo 


TP321 


532100 


18Cr-10Ni-Ti 


TP321 


S32100 


18Cr-10Ni-Ti 


TP321H 


S32109 


ISCr-lONi-Ti 


TP321H 


532109 


18Cr-10Ni-Ti 


TP347 


534700 


18Cr-10Ni-Cb 


TP347 


S34700 


18Cr~10Ni-Cb 


TP347H 


534709 


18Cr-10Ni-Cb 


TP347H 


534709 


18Cr-10Ni-Cb 


TP348 


S34800 


18Cr-10Ni-Cb 


TP348 


S34800 


18Cr-10Ni-Cb 


TP348H 


S34809 


18Cr-10Ni~Cb 


TP348H 


S34809 


18Cr-10Ni-Cb 




S31254 


20Cr-18Ni-6Mo 




531254 


20Cr-18Ni~6Mo 


TP304 


S30400 


18Cr-SNi 


TP304 


S30400 


18Cr-8Ni 


TP304H 


S30409 


18Cr-8Ni 


TP304H 


S30409 


ISCr-SNi 


TP304L 


S30403 


18Cr-8Ni 


TP304L 


S30403 


18Cr-8Ni 


TP304N 


S30451 


18Cr-8Ni~N 


TP304N 


S30451 


18Cr-8Ni-N 




530815 


21Cr-llNi-N 




S30815 


21Cr-llNi-N 



(1) 

(D(9) 

(9) 



(10) 
(9)(10) 

(9) 

(1) 

(D(9) 
(10) 
(9)(10) 

(D(10) 
(D(9)(10) 
(10) 
(9) (10) 

(9) 

(10) 
(9)(10) 

(9)' 

(10) 
(9)(10) 

(9) 

(1) 
(1)(9) 

(10) 
(9) (10) 

(9) 

(1) 

(D(9) 
(10) 
(9)(10) 

(1) 
(D(9) 



87 
87 

75 
75 

75 
75 
75 
75 

70 
70 
80 

80 

75 
75 
75 
75 
75 
75 

75 
75 
75 
75 

75 
75 
75 
75 

94 
94 

75 
75 
75 
75 

70 
70 
80 
80 

87 
87 



45 


0.85 


45 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


25 


0.85 


25 


0.85 


35 


0.85 


35 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


44 


0.85 


44 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


25 


0.85 


25 


0.85 


35 


0.85 


35 


0.85 


45 


0.85 


45 


0.85 



134 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 

Welded Pipe and Tube - Without Filler Metal (Cont'd) 
Austenitic (Cont'd) 

A 249 
A 249 
A 249 



21.2 


21.0 


18.7 


16.9 


15.7 


15.0 


14.8 


14.6 


14.5 


14.3 


14.1 


13.9 


13.8 


12.7 


9.9 


7.7 


5.9 


4.4 




21.2 


21.0 


19.8 


19.0 


18.5 


18.2 


18.0 


17.9 


17.7 


17.5 


17.3 


17.0 


16.2 


12.7 


93 


7.7 


5.9 


4.4 




17.0 


17.0 


17.0 


17.0 


16.5 


15.9 


15.7 


15.5 


15.3 


15.1 


14.8 


14.6 


14.4 


11.7 


8.8 


63 


4.7 


3.4 


TP309H 


17.0 


14.9 


13.7 


12.8 


12.2 


11.8 


11.6 


11.5 


11.3 


11.2 


11.0 


10.8 


10.6 


10.4 


8.8 


63 


4.7 


3.4 


TP309H 


17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 


10.0 


9.9 


9.8 


9.7 


9.6 


9.5 


9.4 


83 


63 


TP316 


17.0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 


13.5 


13.4 


13.2 


13.1 


13.0 


12,9 


103 


83 


63 


TP316 


17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 


10.0 


9.9 


9.8 


9.7 


9.6 


9.5 


9,4 


83 


63 


TP316H 


17,0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 


13.5 


13.4 


13.2 


13.1 


13.0 


12.9 


103 


83 


63 


TP316H 


14.2 


12.1 


10.8 


9.9 


9.3 


8.8 


8.7 


8.5 


8.3 


8.1 


8.0 
















TP316L 


14.2 


14.2 


14.2 


13.4 


12.5 


11.9 


11.7 


11.4 


11.2 


11.0 


10.8 
















TP316L 


19.4 


17.6 


16.1 


15.0 


14.0 


13.3 


12.9 


12.6 


12.3 


12.1 


11.9 


11.6 


11.4 


11.2 


11.0 


103 


83 


63 


TP316N 


19.4 


19.4 


18.7 


18.2 


18.1 


17.9 


17.4 


17.0 


16.7 


16.3 


16.0 


15.7 


15.4 


15.1 


23.4 


103 


83 


63 


TP316N 


17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 


10.0 


93 


9.8 


9.7 


9.6 


9.5 


9,4 


83 


63 


TP317 


17.0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 


13,5 


13.4 


13.2 


13.1 


13.0 


12.9 


103 


83 


63 


TP317 


17.0 


15.3 


14.1 


13.0 


12.2 


11.5 


11.2 


11.0 


10.8 


10.7 


10.5 


10.4 


10.3 


10.2 


8.2 


5.9 


43 


3 A 


TP321 


17.0 


17.0 


16.2 


15.9 


15.9 


15.5 


15.2 


14.9 


14.6 


14.4 


14.2 


14.1 


13.9 


13.8 


8.2 


5.9 


43 


3 A 


TP321 


17.0 


15.3 


14.1 


13.0 


12.2 


11.5 


11.2 


11.0 


10.8 


10.7 


10.5 


10.4 


10.3 


10.2 


10.1 


7.7 


5.9 


4.6 


TP321H 


17.0 


17.0 


16.2 


15.9 


15.9 


15.5 


15.2 


14.9 


14.6 


14.4 


14,2 


14.1 


13.9 


13.8 


10.5 


7.7 


5.9 


4.6 


TP321H 


17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 


11.5 


11.5 


11.4 


11.4 


11.4 


10.3 


7.8 


5.2 


3.8 


TP347 


17.0 


17.0 


16.0 


15.1 


14,6 


14.3 


14.3 


14.3 


14.3 


14.3 


14.3 


14.2 


14.1 


13.6 


103 


7.8 


5.2 


3.8 


TP347 


17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 


11.5 


11.5 


11.4 


11.4 


11.4 


11.4 


11.3 


8.9 


6.7 


TP347H 


17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 


14.3 


14.3 


14.2 


14.1 


14.0 


13.7 


12.0 


8.9 


6.7 


TP347H 


17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 


11.5 


11.5 


11.4 


11.4 


11.4 


103 


7.8 


5.2 


3.8 


TP348 


17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 


14.3 


14.3 


14.2 


14.1 


13.6 


103 


78 


5.2 


3.8 


TP348 


17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 


11.5 


11.5 


11.4 


11.4 


11.4 


11.4 


11.3 


8.9 


6.7 


TP348H 


17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 


14.3 


14.3 


14.2 


14.1 


14.0 


13.7 


12.0 


8.9 


6.7 


TP348H 



17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


8.3 


6.6 


5.2 


TP304 


17,0 


17.0 


16.1 


15.5 


14.8 


14.1 


13.8 


13.5 


13,2 


12,9 


12.6 


12.4 


12.1 


11.9 


103 


83 


6.6 


5.2 


TP304 


17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


83 


6.6 


5.2 


TP304H 


17.0 


17.0 


16.1 


15.5 


14.8 


14.1 


13.8 


13.5 


13.2 


12.9 


12.6 


12.4 


12.1 


11.9 


103 


83 


6.6 


5.2 


TP304H 


14.2 


12.1 


10.9 


93 


9.3 


8.8 


8.6 


8.5 


8.3 


8.2 


















TP304L 


14.2 


14.2 


14.2 


13.4 


12.5 


11.9 


11.7 


11.4 


11.3 


11.1 


















TP304L 


19.4 


16.2 


14.2 


12.8 


11.9 


11.3 


11.0 


10.8 


10.6 


10.5 


10.3 


10.0 


9.8 


9.6 


9A 


8.3 


6.6 


5.2 


TP304N 


19.4 


19.4 


18.5 


17.3 


16.0 


15.2 


14.9 


14.6 


14.4 


14.1 


13.8 


13.6 


13.3 


13.0 


103 


83 


6.6 


5.2 


TP304N 


21.2 


21.0 


18.7 


16.9 


15.7 


15.0 


14.8 


14.6 


14.5 


14.3 


14.1 


13.9 


13.8 


12.7 


93 


7.7 


5.9 


4.4 




21.2 


21.0 


19.8 


19.0 


18.5 


18.2 


18.0 


17.9 


17.7 


17.5 


17.3 


17.0 


16.2 


12.7 


93 


7.7 


5.9 


4.4 





135 



A 249 



A 249 



A 249 



A 249 



22.8 20.3 18.2 16.8 15.8 15.2 15.0 14.8 14.7 A 249 

22.8 22.8 21.7 20.7 20.0 19.5 19.4 19.3 19.2 

A 312 



A 312 



A 312 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 

















Specified 


Specified 










UNS 








Minimum 


Minimum 


£ 


Spec. 


Type or 




Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Class 


No. 


Composition 


No, 


Notes 


ksi 


ksi 


F 



Welded Pipe and Tube ■ 
Austenitic (Cont'd) 



Without Filler Metal (Cont'd) 



A 312 



A 312 



A 312 



A 312 



(A09) 
(A09) 



A 312 



A 312 



A 312 



A 409 



A 789 
A 790 



TP309H 
TP309H 
TP310H 
TP310H 

TP316 
TP316 
TP316H 
TP316H 

TP316L 
TP316L 
TP316N 
TP316N 

TP317 

TP317 

TP321 

TP321 

TP321H 

TP321H 

TP347 
TP347 
TP347H 
TP347H 

TP348 
TP348 
TP348H 
TP348H 

TPXM-15 
TPXM-15 



Ferritic/Martensitic 



A 268 



TP405 

TP410 

TP429 

TP430 

TP446-1 

TPXM-27 

TPXM-33 



S30909 
S30909 


23Cr-12Ni 
23Cr-12Ni 




S31009 


23Cr-20Ni 




S31009 


23Cr-20Ni 




S31600 


16Cr-12Ni- 


-2Mo 


S31600 


16Cr-12Ni- 


-2Mo 


S31609 


16Cr-12Ni- 


-2Mo 


S31609 


16Cr-12Ni- 


-2Mo 


S31603 


16Cr-12Ni 


-2Mo 


S31603 


16Cr-12Ni 


-2Mo 


S31651 


16Cr-12Ni 


-2MO-N 


S31651 


16Cr-12Ni 


-2Mo-N 


S31700 


18Cr-13Ni 


-3Mo 


S31700 


18Cr-13Ni 


-3Mo 


S32100 


18Cr-10Ni 


-Ti 


S32100 


18Cr-10Ni 


-Ti 


S32109 


18Cr-10Ni 


-Ti 


S32109 


18Cr-10Ni 


-Ti 


S34700 


18Cr-10Nt 


-Cb 


S34700 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 


S34809 


18Cr-10Ni 


-Cb 


S34809 


ISCr-lONi 


-Cb 


S38100 


18Cr-18Ni 


-2S1 


S38100 


ISCr-lSNi 


-2Si 


S31254 


20Cr~18Nl 


-6Mo 


S31254 


20Cr-18Ni 


-6Mo 


S30815 


21Cr-llNi 


-N 


S30815 


21Cr-llNi 


-N 


S32550 


25.5Cr-5,5Ni-3.5W 


S32550 


25.5Cr~5.5Ni-3.5fV 


S40500 


12Cr-At 




S41000 


13Cr 




S42900 


15Cr 




S43000 


17Cr 




S44600 


27Cr 




S44627 


26Q-1MG 




S44626 


27Cr-lMo 


-Ti 



(9) 
(9) 



(10) 
(9) (10) 

(9) 

(1) 

(1)(9) 
(10) 
(9) (10) 

(«(10) 

(D(9)(10) 

(10) 

(9)(10) 

(9) 

(10) 
(9)(10) 

(9) 



8 


(D(io) 


8 


(D(9)(10) 


8 


(1) 


8 


(D(9) 


8 


(1) 


8 


(D(9) 


8 


(1) 


8 


(D(9) 


8 


(1) 


8 


(D(9) 


10H 


(D(35)(36) 


10H 


(1)(35)(36) 


7 




6 




6 




7 




101 


(1) 


101 


(1)(2) 


101 


(2) 



75 

75 
75 
75 

75 
75 
75 
75 

70 
70 

80 
80 

75 
75 
75 
75 
75 
75 

75 
75 
75 

75 

75 
75 

75 
75 

75 
75 
95 
95 

87 
87 

110 

110 



60 
60 
60 
60 
70 
65 
68 



30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


25 


0.85 


25 


0.85 


35 


0.85 


35 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


30 


0.85 


45 


0.85 


45 


0.85 


45 


0.85 


45 


0.85 


80 


1.00 


80 


1.00 


30 


0.85 


30 


0.85 


35 


0.85 


35 


0,85 


40 


0.85 


40 


0.85 


45 


0.85 



136 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 































Welded Pipe and Tube - Without Filler Metal (Cont'd) 




































Austenitic (C 


snt'd) 


17.0 


17.0 


17.0 


17.0 


16.5 


15.9 


15.7 


15.5 


15.3 15.1 14.8 14.6 


14.4 11.7 


3.8 6.5 4.7 3.4 


TP309H 


A 312 


17.0 


14.9 


13.7 


12.8 


12.2 


11.8 


11.6 


11.5 


11.3 11.2 11.0 10.8 


10.6 10.4 


3.8 6.5 4.7 3.4 


TP309H 




17.0 


17.0 


17.0 


16.9 


16.4 


15.7 


15.5 


15.2 


15.0 14.8 14.6 14.4 


14.2 11.7 


3.8 6.5 4.7 3.4 


TP310H 




17.0 


15.0 


13.7 


12.8 


12.1 


11.7 


11.5 


11.3 


11.1 11.0 10.8 10.7 


10.5 10.3 


3.8 6.5 4.7 3.4 


TP310H 




17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 10.0 \ 


?.9 9.8 


< 


?.7 < 


?.6 


?.5 < 


?.4 83 63 


TP316 


A 312 


17.0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 13.5 13.4 13.2 


13.1 13.0 12.9 10.5 8.3 63 


TP316 




17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 10.0 < 


?.9 9.8 


( 


J.7 < 


?.6 


3.5 


?A 8.3 63 


TP316H 




17.0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 13.5 13.4 13.2 


13.1 13.0 12.9 10.5 8.3 6.3 


TP316H 




14.2 


12.1 


10.8 


9.9 


9.3 


8.8 


8.7 


8.5 


\ 


3.3 i 


3.1 I 


3.0 ... 












TP316L 


A 312 


14.2 


14.2 


14.2 


13.4 


12.5 


11.9 


11.7 


11.4 


11.2 11.0 10.8 ... 












TP316L 




19.4 


17.6 


16.1 


15.0 


14.0 


13.3 


12.9 


12.6 


12.3 12.1 11.9 11.6 


11.4 11.2 11.0 10.5 8.3 6.3 


TP316N 




19.4 


19.4 


18.7 


18.2 


18.1 


17.9 


17.4 


17.0 


16.7 16.3 16.0 15.7 


ISA 15.1 13.4 10.5 8.3 6.3 


TP316N 




17.0 


14.7 


13.2 


12.1 


11.3 


10.7 


10.5 


10.3 


10.1 10.0 < 


?.9 9.8 


< 


?.7 


9.6 


9.5 


?A 8.3 63 


TP317 


A 312 


17.0 


17.0 


17.0 


16.4 


15.3 


14.5 


14.1 


13.9 


13.7 13.5 13.4 13.2 


13.1 13.0 12.9 10.5 8.3 6.5 


TP317 




17.0 


15.3 


14.1 


13.0 


12.2 


11.5 


11.2 


11.0 


10.8 10.7 10.5 10.4 


10.3 10.2 


8.2 


5.9 4.3 3.1 


TP321 




17.0 


17.0 


16.2 


15.9 


15.9 


15.5 


15.2 


14.9 


14.6 14.4 14.2 14.1 


13.9 13.8 


3.2 


S.9 4.3 3.1 


TP321 




17.0 


15.3 


14.1 


13.0 


12.2 


11.5 


11.2 


11.0 


10.8 10.7 10.5 10.4 


10.3 10.2 10.1 


7.7 5.9 4.6 


TP321H 




17.0 


17.0 


16.2 


15.9 


15.9 


15.5 


15.2 


14.9 


14.6 14.4 14.2 14.1 


13.9 13.8 10.5 


7.7 5.9 4.6 


TP321H 




17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11-9 


11.8 


11.6 11.5 11.5 11.4 


11.4 11.4 103 


7.8 5.2 3.8 


TP347 


A 312 


17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 14.3 14.3 14.2 


14.1 13.6 103 


7.8 5.2 3.6 


TP347 




17.0 


15.6 


14,6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 11.5 11.5 11.4 


11.4 11.4 11.4 11.3 8.9 6.7 TP347H 




17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 14.3 14.3 14.2 


14.1 14.0 13.7 12.0 8.9 6.7 TP347H 




17.0 


15.6 


14.6 


13.6 


12,8 


12.2 


11.9 


11.8 


11.6 11.5 11.5 11.4 


11.4 11.4 10.3 


7.8 5.2 3.8 TP348 


A312 


17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 14.3 14.3 14.2 


14.1 13.6 10.3 


7.8 5.2 3.8 


' TP348 




17.0 


15.6 


14.6 


13.6 


12.8 


12.2 


11.9 


11.8 


11.6 11.5 11.5 11.4 


11.4 11.4 11.4 11.3 8.9 6.7 TP348H 




17.0 


17.0 


16.0 


15.1 


14.6 


14.3 


14.3 


14.3 


14.3 14.3 14.3 14.2 


14.1 14.0 13.7 12.0 8.9 6.7 TP348H 




17.0 


14.2 


12.7 


11.7 


11.0 


10.4 


10.2 


10.0 




9.8 


?.6 


?.4 9.2 




3.0 


3.8 






TPXM-15 


A 312 


17.0 


17.0 


16.1 


15.5 


14.8 


14.1 


13.8 


13.5 


13.2 12.9 12.6 12.4 


12.1 11.9 






TPXM-15 




23.0 


20.8 


18.6 


17.2 


16.2 


15.6 


15.3 


15.1 


15.0 


















(A09) 


23.0 


23.0 


21.9 


20.9 


20.1 


19.7 


19.6 


19.6 


19.5 


















(A09) 


21.2 


21.0 


18.7 


16.9 


15.7 


15.0 


14.8 


14.6 


14.5 14.3 14.1 13.9 


13.8 12.7 


9.9 


7.7 5.9 4.4 




A 409 


21.2 


21.0 


19.8 


19.0 


18.5 


18.2 


18.0 


17.9 


17.7 17.5 17.3 17.0 


16.2 12.7 


9.9 


7.7 5.9 4.4 






26.7 


26.6 


25.1 


24.3 


24.0 




























A 789 


26.7 


26.6 


25.1 


24.3 


24.0 




























A 790 




































Ferritic/Martensitic 


14.6 


14.6 


14.3 


14.0 


13.8 


13.5 


13.2 


12.9 






















TP405 


A 268 


14.6 


14.6 


14.3 


14.0 


13.8 


13.5 


13.2 


12.9 






















TP410 




14.6 


14.6 


14.3 


14.0 


13.8 


13.5 


13.2 


12.9 






















TP429 




14.6 


14.6 


14.3 


14.0 


13.8 


13.5 


13.2 


12.9 






















TP430 




17.0 


17.0 


16.4 


16.0 


15.6 


15.2 


15.0 


14.7 






















TP446-1 




15.8 


15.8 


15.5 


15.4 


15.4 


15.4 


15.4 
























TPXM-27 




16.5 


16.5 


16.4 


16.2 


16.0 


15.7 


15.4 
























TPXM-33 





137 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 









UNS 






ipec. 


Type or 




Alloy 


Nominal 


P- 


No. 


Grade 


Class 


No. 


Composition 


No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


£ 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Welded Pipe and Tube - Without Filler Metal (Cont'd) 
Ferritic/Martensitic (Cont'd) 





A 731 


TPXM-27 


544627 


27Cr-lMo 


101 


(2) 


65 


40 


0.85 






TPXM-33 


S44626 


27Cr~lMo-Ti 


101 


(2) 


65 


40 


0.85 




Ferritic/Austenitic 


















A 789 


S31803 


S31803 


22Cr-5.5Ni-3Mo-N 


10H 


(1X33X34) 


90 


65 


0.85 


(A08) 




S32205 


S32205 


22Cr~5.5Ni-3Mo-N 


10H 


(0(33X34) 


95 


70 


0.85 


(A08) 




532750 


532750 


25Cr-7Ni-4Mo~N 


10H 


(1X33X39) 


116 


80 


0.85 




A 790 


531803 


531803 


22Cr-5.5Ni-3Mo-N 


10H 


(1X33X34) 


90 


65 


0.85 


(A08) 




532205 


S32205 


22Cr-5.5Ni-3Mo-N 


10H 


(0(33X34) 


90 


65 


0.85 


(A08) 




S32750 


S32750 


25Cr-7Ni-4Mo-N 


10H 


(0(3 3) (3 9) 


116 


80 


0.85 



Welded Pipe - Filler Metal Added 
Austenitic 



A 358 



304 
304 
304 
304 

A 358 304L 
304L 
304L 
304L 



A 358 



A 358 



A 358 



A 358 



A 358 



A 358 



304N 
304N 
304N 
304N 



309 
309 
309 
309 

310 
310 
310 
310 

310 
310 
310 
310 

316 
316 
316 
316 



1 &3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 

1 & 3 
2 



530400 
S30400 
S30400 
S30400 

530403 
530403 
S30403 
530403 

530451 
530451 
S30451 

S30451 

S30815 
S30815 
530815 
S30815 

S30900 
530900 
530900 
S30900 

S31000 
S31000 
S31000 
S31000 

531000 
S31000 
S31000 
S31000 

S31600 
531600 
531600 
S31600 



18Cr-8Ni 
18Cr-8Ni 
18Cr-8Ni 
18Cr-8Ni 

18Q-8N 
18Cr-8N 
18Q-8N 
18Q-8N 

18Cr-8Ns-N 
18Cr-8Ni-N 
18Cr-8Ni~N 
18Cr-8Ni-N 

21Cr-llNi-N 
21Cr-llNi-N 
21Cr-llNi-N 
21Cr-llNi-N 

23Cr-12Ni 

23Cr-12Ni 
23Cr-12Ni 
23Cr-12Ni 

25Cr-20Ni 
25Cr-20Ni 
25Cr-20Ni 
25Cr~20Ni 

25Cr-20Ni 
25Cr-20Ni 
25Cr-20Ni 
25Cr-20Ni 

16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2AAo 



(D(ioxii) 


75 


30 


1.00 


(O(io)do 


75 


30 


0.90 


(0(9)(io)(iD 


75 


30 


1.00 


(0(9) (10) (11) 


75 


30 


0.90 


(0 


70 


25 


1.00 


(0 


70 


25 


0.90 


(0(9) 


70 


25 


1.00 


(0(9) 


70 


25 


0.90 


(0(io) 


80 


35 


1.00 


(0(io) 


80 


35 


0.90 


(0(9X10) 


80 


35 


1.00 


(0(9X10) 


80 


35 


0.90 


(0 


87 


45 


1.00 


(0 


87 


45 


0.90 


(0(9) 


87 


45 


1.00 


(0(9) 


87 


45 


0.90 


(0(io) 


75 


30 


1.00 


(0(io) 


75 


30 


0.90 


(0(9)(10) 


75 


30 


1.00 


(0(9X10) 


75 


30 


0.90 


(0(10X14) 


75 


30 


1.00 


(0(10X14) 


75 


30 


0.90 


(0(9) (10) (14) 


75 


30 


1.00 


(1)(9)(10)(14) 


75 


30 


0.90 


(0(10X15) 


75 


30 


1.00 


(0(10X15) 


75 


30 


0.90 


(0(9X10X15) 


75 


30 


1.00 


(1)(9)(10)(15) 


75 


30 


0.90 


(O(ioxii) 


75 


30 


1.00 


(O(io)do 


75 


30 


0.90 


(0(9X10X11) 


75 


30 


1.00 


(0(9) (10) (11) 


75 


30 


0.90 



138 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



Welded Pipe and Tube - Without Filler Metal (Cont'd) 
Ferritic/Martensitic (Cont'd) 



15.8 


15.8 


15.5 


15.4 


15.4 


15.4 


15.8 


15.8 


15.7 


15.4 


15.3 


15.0 



15.4 
14.7 



21.9 21.9 21.1 20.3 19.8 19.6 

23.1 23.1 22.3 21.4 20.9 20.7 

28.2 28.0 26.5 25.6 25.2 25.0 

21.9 21.9 21.1 20.3 19.8 19.6 

21.9 21.9 21.1 20.3 19.8 19.6 

28.2 28.0 26.5 25.6 25.2 25.0 



TPXM-27 


A 731 




TPXM-33 






Ferritic/Austenitic 




S31803 


A 789 




S32205 




(A08) 


S32750 




(A08) 


S31803 


A 790 




S32205 




(A08) 


S32750 




(A08) 



Welded Pipe - Filler Metal Added 
Austenitic 

A 358 



A 358 



20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7,7 


6.1 


304 


18.0 


15.0 


13.5 


12.4 


11.6 


11.1 


10.8 


10.6 


10.3 


10.1 


9.9 


9J 


9.5 


9.3 


9.1 


8.8 


7.0 


5.5 


304 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


304 


16.2 


16.2 


15.3 


14.8 


14.1 


13.4 


13.1 


12.8 


12.6 


12.3 


12.0 


11.8 


11.6 


11.3 


10.0 


7.9 


63 


4.9 


304 


16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















304L 


15.0 


12.8 


11.5 


10.5 


9.8 


9.3 


9.1 


9.0 


8.8 


8.7 


















304L 


16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















304L 


15.0 


15.0 


15.0 


14.2 


13.3 


12.6 


12.3 


12.1 


11.9 


11.7 


















304L 


22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


304N 


20.6 


17.2 


15.0 


13.5 


12.6 


11.9 


11.7 


11.5 


11.3 


11.1 


10.9 


10.6 


10.4 


10,2 


9.9 


8.8 


7.0 


5.5 


304N 


22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


304N 


20.6 


20.6 


19.6 


18.3 


17.0 


16.1 


15.8 


15.5 


15.2 


14.9 


14.7 


14.4 


14.0 


13.7 


11.2 


8.8 


7.0 


5.5 


304N 


24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




22.4 


22.2 


21.0 


20.2 


19.6 


19.3 


19.1 


18.9 


18.7 


18.5 


18.3 


18.0 


17.2 


13.4 


10.4 


8.1 


6.2 


4.7 




24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




22.4 


22.2 


21.0 


20.2 


19.6 


19.3 


19.1 


18.9 


18.7 


18.5 


18.3 


18.0 


17.2 


13.4 


10.4 


8.1 


6.2 


4.7 




20.0 


17.5 


16.1 


15.1 


14.4 


13.9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


9.9 


7.1 


5.0 


3.6 


2.5 


309 


18.0 


15.8 


14.5 


13.6 


13.0 


12.5 


12.3 


12.1 


12.0 


11.8 


11.6 


11.5 


11.3 


8.9 


6.4 


4.5 


3.2 


23 


309 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


15.9 


9.9 


7.1 


5.0 


3.6 


2.5 


309 


18.0 


18.0 


18.0 


18.0 


17.5 


16.9 


16.6 


16.4 


16.2 


15.9 


15.7 


15.5 


143 


8.9 


6.4 


4.5 


3.2 


23 


309 


20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9.9 


7,1 


5.0 


3.6 


2.5 


310 


18.0 


15.9 


14.5 


13.6 


12.9 


12.4 


12.1 


12.0 


11.8 


11.6 


11.5 


11.3 


11.1 


8.9 


6.4 


4.5 


3.2 


23 


310 


20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


9.9 


7.1 


5.0 


3.6 


2.5 


310 


18.0 


18.0 


18.0 


17.9 


17.4 


16.7 


16.4 


16.1 


15.9 


15.7 


15.5 


15.2 


14.3 


8.9 


6.4 


4.5 


3.2 


23 


310 


20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9.9 


7.1 


5.0 


3.6 


23 


310 


18.0 


15.9 


14.5 


13.6 


12.9 


12.4 


12.1 


12.0 


11.8 


11.6 


11.5 


11.3 


11.1 


8.9 


6.4 


4.5 


3.2 


23 


310 


20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


9.9 


7.1 


5.0 


3.6 


2.5 


310 


18.0 


18.0 


18.0 


17.9 


17.4 


16.7 


16.4 


16.1 


15.9 


15.7 


15.5 


15.2 


14.3 


8.9 


6.4 


4.5 


3.2 


23 


310 


20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


316 


18.0 


15.5 


14.0 


12.9 


12.0 


11.3 


11.1 


10.9 


10.7 


10.6 


10.5 


10.4 


10.3 


10.2 


10.1 


9.9 


8.8 


6.7 


316 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


316 


18.0 


18.0 


18.0 


17.4 


16.2 


15.3 


15.0 


14.7 


14.5 


14.3 


14.1 


14.0 


13.9 


13.8 


13.6 


11.2 


8.8 


6.7 


316 



A 358 



A 358 



A 358 



A 358 



A 358 



A 358 



139 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Spec. 
No. 



Type or 
Grade 



Class 



UNS 






Alloy 


Nominal 


P- 


No. 


Composition 


No, 



Notes 



Specified 


Specified 




Minimum 


Minimum 


E 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Welded Pipe - Filler Metal Added (Cont'd) 
Austenitic (Cont'd) 





A 358 


316L 


1 & 3 


S31603 


16Cr-12Ni-2Mo 






316L 


2 


S31603 


16Cr-12Ni-2Mo 






316L 


1 & 3 


S31603 


16Cr-12IMi-2Mo 






316L 


2 


S31603 


16Cr-12Ni-2Mo 




A 358 


316N 


1 & 3 


S31651 


16Cr-12Ni-2Mo--N 






316N 


2 


S31651 


16Cr-12Ni»2Mo-N 






316N 


1 & 3 


S31651 


16Cr-12Ni-2Mo-N 






316N 


2 


531651 


16Cr-12Ni-2Mo-N 




A 358 


321 


1 & 3 


S32100 


18Cr-10Ni-Ti 






321 


2 


S32100 


18Cr-10Nt-Ti 






321 


1 & 3 


S32100 


18Cr-10Ni-Ti 






321 


2 


S32100 


18Cr-10Ni-Ti 




A 358 


347 


1 & 3 


S34700 


18Cr~10Ni-Cb 






347 


2 


S34700 


18Cr-10Ni-Cb 






347 


1 & 3 


S34700 


18Cr-10Ni~Cb 






347 


2 


S34700 


18Cr-10Ni-Cb 




A 358 


348 


1 & 3 


S34800 


18Cr-10Ni-Cb 






348 


2 


S34800 


18Cr-10Ni-Cb 






348 


1 & 3 


S34800 


18Cr-10Ni-Cb 






348 


2 


S34800 


18Cr-10Ni-Cb 


(A09) 


A 358 




1 & 3 


S31254 


20Cr-18Ni-6Mo 


(A09) 






2 


S31254 


20Cr-18Ni-6Mo 


(A09) 






1 & 3 


S31254 


20Cr-18Ni-6Mo 


(A09) 






2 


S31254 


20Cr-18Ni-6Mo 


(A09) 


A 358 




1 & 3 


$31254 


20Cr-18Ni-6Mo 


(A09) 






2 


S31254 


20Cr-18Ni-6Mo 


(A09) 






1 & 3 


S31254 


20Cr-18Ni-6Mo 


(A09) 






2 


S31254 


20Cr-18Ni-6Mo 




A 409 


TP304 




530400 


18Cr-8Ni 






TP304 




S30400 


18Cr-8Ni 






TP304 




S30400 


18Cr-SNi 






TP304 




S30400 


18Cr-8Ni 






TP304 




S30400 


18Cr-8Ni 






TP304 




S30400 


18Cr-8Ni 




A 409 


TP304L 




S30403 


18Cr-8Ni 






TP304L 




S30403 


18Cr-8Ni 






TP304L 




S30403 


18Cr-8Ni 






TP304L 




S30403 


18Cr-8Ni 






TP304L 




S30403 


18Cr-8Ni 






TP304L 




S30403 


18Cr-8Ni 




A 409 






S30815 
S30815 
S30815 
S30815 
S30815 
S30815 


21Cr~llNi-N 
21Cr~llNi-N 
21Cr-llNi-N 
2lCr-llNi-N 
21Cr-llNi-N 
21Cr-llNi-N 



(1) 


70 


25 


1.00 


(1) 


70 


25 


0.90 


(D(9) 


70 


25 


1.00 


(D(9) 


70 


25 


0.90 


(D(10) 


80 


35 


1.00 


(D(10) 


80 


35 


0.90 


(D(9)(10) 


80 


35 


1.00 


(1)(9)(10) 


80 


35 


0.90 


(1)(10)(11) 


75 


30 


1.00 


(D(10)(ll) 


75 


30 


0,90 


(1)(9)(10)(11) 


75 


30 


1.00 


(1)(9)(10)(11) 


75 


30 


0.90 


(i)(io)(ii) 


75 


30 


1.00 


(1)(10)(11) 


75 


30 


0.90 


(1)(9)(10)(11) 


75 


30 


1.00 


(1)(9)(10)(11) 


75 


30 


0.90 


(1)(10)(11) 


75 


30 


1.00 


(1)(10)(11) 


75 


30 


0.90 


(1)(9)(10)(11) 


75 


30 


1.00 


(1)(9)(10)(11) 


75 


30 


0.90 


(1) 


95 


45 


1.00 


(1) 


95 


45 


0.90 


(D(9) 


95 


45 


1.00 


(D(9) 


95 


45 


0.90 


(1) 


100 


45 


1.00 


(1) 


100 


45 


0.90 


(1X9) 


100 


45 


1,00 


(1X9) 


100 


45 


0.90 


(1X10X29) 


75 


30 


1.00 


(1X10X30) 


75 


30 


0.90 


(1X10X31) 


75 


30 


0,80 


(1X9X10X29) 


75 


30 


1.00 


(1)(9)(10)(30) 


75 


30 


0.90 


(1)(9)(10)(31) 


75 


30 


0.80 


(D(29) 


70 


25 


1.00 


(D(30) 


70 


25 


0.90 


(D(31) 


70 


25 


0.80 


(1X9X29) 


70 


25 


1.00 


(1X9X30) 


70 


25 


0,90 


(1X9X31) 


70 


25 


0.80 


UX29) 


87 


45 


1.00 


(1X30) 


87 


45 


0.90 


(0(31) 


87 


45 


0,80 


(1X9X29) 


87 


45 


1.00 


UX9X30) 


87 


45 


0.90 


(1X9X31) 


87 


45 


0.80 



140 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec, 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 

































Welded Pipe - 


Filler Metal Added (Cont'd) 






































Austenitic (Cont'd) 




16.7 


14.2 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 
















316L 


A 358 




15.0 


12.8 


11.4 


10.5 


9.B 


9.4 


9.2 


9.0 


8.8 


8.6 


8.4 
















316L 






16.7 


16.7 


16.7 


15.7 


14.8 


14.0 


13.7 


13.5 


13.2 


12.9 


12.7 
















316L 






15.0 


15.0 


15.0 


14.2 


13.3 


12.6 


12.4 


12.1 


11.9 


11.6 


11.4 
















316L 






22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


316N 


A 358 




20.6 


18.6 


17.1 


15.8 


14.8 


14.0 


13.7 


13.4 


13.1 


12.8 


12.6 


123 


12.1 


11.9 


11.6 


11.1 


8.8 


6.7 


316N 






22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


316N 






20.6 


20.6 


19.8 


19.3 


19.1 


18.9 


18.5 


18.0 


17.7 


173 


16.9 


16.6 


163 


16.0 


14.2 


11.1 


8.8 


6.7 


316N 






20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


123 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


321 


A 358 




18.0 


16.2 


14.9 


13.8 


12.9 


12.2 


11.9 


11.7 


11.5 


11.3 


11.2 


11.0 


10.9 


10.8 


8.6 


6.2 


4.5 


3.2 


321 






20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


321 






18.0 


18.0 


17.2 


16.8 


16.8 


16.5 


16.1 


15.8 


15.5 


153 


15.1 


14.9 


14.7 


14.6 


8.6 


6.2 


4.5 


3.2 


321 






20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9 A 


6.1 


4.4 


347 


A 358 




18.0 


16.6 


15.4 


14.4 


13.5 


12.9 


12.6 


12.4 


12.3 


12.2 


12.1 


12.1 


12.1 


12.1 


10.9 


8.2 


5.5 


4.0 


347 






20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


347 






18.0 


18.0 


16.9 


16.0 


15.4 


15.2 


15.1 


15.1 


15.1 


15.1 


15.1 


15.0 


14.9 


14.4 


10.9 


8.2 


5.5 


4.0 


347 






20.0 


1S.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


348 


A 358 




18.0 


16.6 


15.4 


14.4 


13.5 


12.9 


12.6 


12.4 


12.3 


12.2 


12.1 


12.1 


12.1 


12.1 


10.9 


8.2 


5.5 


4.0 


348 






20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


348 






18.0 


18.0 


16.9 


16.0 


15.4 


15.2 


15.1 


15.1 


15.1 


15.1 


15.1 


15.0 


14.9 


14.4 


10.9 


8.2 


5.5 


4.0 


348 






27.1 


24.5 


21.9 


20.2 


19.1 


18.3 


18.0 


17.8 


17.7 






















A 358 


(A09) 


24.4 


22.1 


19.7 


18.2 


17.2 


16.5 


16.2 


16.0 


15.9 
























(A09) 


27.1 


27.1 


25.8 


24.6 


23.7 


23.2 


23.1 


23.0 


22.9 
























(A09) 


24.4 


24.4 


23.2 


22.1 


21.3 


20.9 


20.8 


20.7 


20.6 
























(A09) 


28.6 


24.5 


21.9 


20.2 


19.1 


18.3 


18.0 


17.8 


17.7 






















A 358 


(A09) 


25.7 


22.1 


19.7 


18.2 


17.2 


16.5 


16.2 


16.0 


15.9 
























(A09) 


28.6 


28.6 


27.2 


25.9 


25.0 


24.4 


24.3 


24.1 


23.9 
























(A09) 


25.7 


25.7 


24.5 


23.3 


22.5 


22.0 


21.9 


21.7 


21.5 
























(A09) 


20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


TP304 


A 409 




18.0 


15.0 


13.5 


12.4 


11.6 


11.1 


10.8 


10.6 


10.3 


10.1 


9.9 


9J 


9.5 


93 


9.1 


8.8 


7.0 


5.5 


TP304 






16.0 


13.3 


12.0 


11.0 


10.4 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


8.5 


83 


8.1 


7.8 


6.2 


4.9 


TP304 






20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


143 


14.0 


12.4 


9.8 


7.7 


6.1 


TP304 






18.0 


18.0 


17.0 


16.5 


15.7 


14.9 


14.6 


14.3 


13.9 


13.7 


13.4 


13.1 


12.8 


12.6 


11.2 


8.8 


7.0 


5.5 


TP304 






16.0 


16.0 


15.1 


14.6 


14.0 


13.3 


13.0 


12.7 


12.4 


12.1 


11.9 


11.7 


11.4 


11.2 


9.9 


7.8 


6.2 


4.9 


TP304 






16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















TP304L 


A 409 




15.0 


12.8 


11.5 


10,5 


9.8 


9.3 


9.1 


9.0 


8.8 


8.7 


















TP304L 






13.3 


11.4 


10.2 


9.4 


8.7 


83 


8.1 


8.0 


7.9 


7.7 


















TP304L 






16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















TP304L 






15.0 


15.0 


15.0 


14.2 


13.3 


12.6 


12.3 


12.1 


11.9 


11.7 


















TP304L 






13.3 


13.3 


13.3 


12.6 


11.8 


11.2 


11.0 


10.8 


10.6 


10.4 


















TP304L 






24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 409 




22.4 


22.2 


19.8 


17.9 


16.7 


15.9 


15.7 


15.5 


15.3 


15.1 


14.9 


14.8 


14.6 


13.4 


10.4 


8.1 


6.2 


4.7 








19.9 


19.8 


17.6 


15.9 


14.8 


14.2 


13.9 


13.8 


13.6 


13.4 


133 


13.1 


13.0 


11.9 


9.3 


7.2 


5.5 


4.2 








24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


203 


20.0 


19.1 


14.9 


11.6 


9.0 


6.9 


5.2 








22.4 


22.2 


21.0 


20.2 


19.6 


19.3 


19.1 


18.9 


18.7 


18.5 


183 


18.0 


17.2 


13.4 


10.4 


8.1 


6.2 


4.7 








19.9 


19.8 


18.6 


17.9 


17.4 


17.1 


17.0 


16.8 


16.6 


16.5 


16.2 


16.0 


15.3 


11.9 


9.3 


7.2 


5.5 


4.2 









141 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 









UNS 






pec. 


Type or 




Alloy 


Nominal 


p. 


No. 


Grade 


Class 


No. 


Composition 


No. 



Notes 



Specified Specified 

Minimum Minimum E 

Tensile, Yield, or 

ksi ksi F 



Welded Pipe - Filler Metal Added (Cont'd) 
Austenitic (Cont'd) 



A 409 



TP316 
TP316 
TP316 
TP316 
TP316 
TP316 

TP316L 
TP316L 
TP316L 
TP316L 
TP316L 
TP316L 



Ferritic/Austenitic 



A 409 



A 928 



S31803 1 & 3 
S31803 2 



531600 
S31600 
S31600 
S31600 
S31600 
S31600 

$31603 
S31603 
S31603 
S31603 
S31603 
S31603 



S31803 
S31803 



16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12N!-2Mo 

16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 
16Cr-12Ni-2Mo 



22Cr-5.5Ni-3Mo-N 
22Cr-5.5Ni-3Mo-N 



(1)(10)(29) 
(1)(10)(30) 

(D(10)(31) 
(1) (9) (10) (2 9) 
(1)(9)(10X30) 
(1) (9) (10) (31) 

(1X29) 

(D(30) 

(DPI) 

(D(9)(29) 

(1X9)00) 

(1X9X31) 



10H (1)(33)(34) 
10H (1)(33)(34) 



75 
75 
75 
75 
75 
75 

70 
70 
70 
70 
70 
70 



90 
90 



30 


1.00 


30 


0.90 


30 


0.80 


30 


1.00 


30 


0.90 


30 


0.80 


25 


1.00 


25 


0.90 


25 


0.80 


25 


1.00 


25 


0.90 


25 


0.80 


65 


1.00 


65 


0.90 



Plate, Sheet, and Strip 
Austenitic 



A 240 



A 240 



A 240 



A 240 



A 240 



304 

304 

304L 

304L 

304N 

304N 



309H 
309H 
309S 
309S 

310H 
310H 
310S 
310S 
310S 
310S 

316 

316 

316L 

316L 

316N 

316N 



S30400 


18Cr-8Ni 




S30400 


ISCr-SNi 




S30403 


18Cr-8Ni 




S30403 


18Cr-8Ni 




S30451 


18Cr-8Ni- 


\S 


S30451 


18Cr-8Ni~ 


M 


S30815 


21Cr-llNi- 


-N 


S30815 


21Cr-llNi- 


-N 


S30909 


23Cr-12Ni 




S30909 


23Cr-12Ni 




S30908 


23Cr-12Ni 




S30908 


23Cr-12Ni 




S31009 


25Cr-20Ni 




S31009 


25Cr-20Ni 




S31008 


25Cr-20Ni 




S31008 


25Cr-20Ni 




S31008 


25Cr~20Ni 




S31008 


25Cr~20Ni 




S31600 


16Cr-12Ni 


~2Mo 


S31600 


l6Cr-12Ni 


~2Mo 


S31603 


16Cr-12Ni 


-2IVSo 


S31603 


16Cr-12Ni 


-2Mo 


S31651 


16Cr-12Ni 


-2Mo-N 


S31651 


16Cr-12Ni 


-2Mo-N 



(10) (11) 
(9) (10) (11) 
(1) 
(1X9) 

dXio) 

(1)(9)(10) 

(1) 

(1X9) 

(9)(11)(27) 

(11X27) 

(D(10) 

(1X9X10) 

(9) 

(10)(11)(14) 

(9)(10)(11)(14) 

(10X10(15) 

(9) (10) (11) (15) 

doxii) 

(9)(10)(11) 

(1) 

(0(9) 

(10) 

(9X10) 



75 
75 
70 
70 
80 
80 

87 
87 

75 
75 
75 
75 

75 
75 
75 
75 
75 
75 

75 
75 
70 
70 
80 
80 



30 


1.00 


30 


1.00 


25 


1.00 


25 


1.00 


35 


1.00 


35 


1.00 


45 


1.00 


45 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


25 


1.00 


25 


1.00 


35 


1.00 


35 


1.00 



142 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 

































Welded 


Pipe - 


Filler Metal Added (Cont'd) 
Austenitk (Cont'd) 


20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


TP316 


A 409 


18.0 


15.5 


14.0 


12.9 


12.0 


11.3 


11.1 


10.9 


10.7 


10.6 


10.5 


10.4 


10.3 


10.2 


10.1 


9.9 


8.8 


6.7 


TP316 




16.0 


13.8 


12.5 


11.4 


10.6 


10.1 


9.9 


9.7 


9.5 


9.4 


9.3 


9.2 


9.1 


9.1 


9.0 


8.8 


7.8 


53 


TP316 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


TP316 




18.0 


18.0 


18.0 


17.4 


16.2 


15.3 


15.0 


14.7 


14.5 


14.3 


14.1 


14.0 


13.9 


13.8 


13.6 


11.2 


8.8 


6.7 


TP316 




16.0 


16.0 


16.0 


15.4 


14.4 


13.6 


13.3 


13.1 


12.9 


12.7 


12.6 


12.5 


12.3 


12.2 


12.1 


9.9 


7.8 


5.9 


TP316 




16.7 


14.2 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 
















TP316L 


A 409 


15.0 


12.8 


11.4 


10.5 


9.8 


9.4 


9.2 


9.0 


8.8 


8.6 


8.4 
















TP316L 




13.3 


11.4 


10.2 


9.3 


8.7 


8.3 


8.1 


8.0 


7.8 


7.7 


7.5 
















TP316L 




16.7 


16.7 


16.7 


15.7 


14.8 


14.0 


13.7 


13.5 


13.2 


12.9 


12.7 
















TP316L 




15.0 


15.0 


15.0 


14.2 


13.3 


12.6 


12.4 


12.1 


11.9 


11.6 


11.4 
















TP316L 




13.3 


13.3 


13.3 


12.6 


11.8 


11.2 


11.0 


10.8 


10.6 


10.3 


10.1 
















TP316L 






































I 


r erritic/Austenitic 


25.7 


25.7 


24.8 


23.9 


23.3 


23.1 


























S31803 


A 928 


23.1 


23.1 


22.3 


21.5 


21.0 


20.8 


























S31803 






































Plate, Sheet, 


and Strip 






































Austenitic 


20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


304 


A 240 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14,3 


14.0 


12.4 


9.8 


7.7 


6.1 


304 




16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















304L 




16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















304L 




22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


304N 




22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


304N 




24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 240 


24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


20.3 


20.0 


19.1 


14.9 


11.6 


9.0 


6.9 


5.2 






20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


16.9 


13.8 


10.3 


7.6 


5.5 


4.0 


309H 


A 240 


20.0 


17.5 


16.1 


15.1 


14.4 


13.9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


10.3 


7.6 


5.5 


4.0 


309H 




20.0 


17.5 


16.1 


15.1 


14.4 


13,9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


9.9 


7.1 


5.0 


3.6 


2.5 


309S 




20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


15.9 


93 


7 A 


5.0 


3.6 


2.5 


309S 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


16.7 


13.8 


10.3 


7.6 


5.5 


4.0 


310H 


A 240 


20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


12.1 


10.3 


7.6 


5.5 


4.0 


310H 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


93 


7.1 


5.0 


3.6 


2.5 


310S 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


93 


7.1 


5.0 


3.6 


2.5 


310S 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


93 


7.1 


5.0 


3.6 


2.5 


310S 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


153 


93 


7.1 


5.0 


3.6 


2.5 


310S 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


316 


A 240 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


316 




16.7 


14.2 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


9.0 


8.8 


8.6 


8.4 


8.3 


6.4 


316L 




16.7 


16.7 


16.7 


15.7 


14.8 


14.0 


13.7 


13.5 


13.2 


12.9 


12.7 


12.4 


12.1 


11.8 


10.8 


10.2 


8.8 


6.4 


316L 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


316N 





143 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 

















Specified 


Specified 










UNS 








Minimum 


Minimum 


£ 


Spec. 


Type or 




Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Class 


No. 


Composition 


No. 


Notes 


ksi 


ksi 


F 



Plate, Sheet, and Strip (Cont'd) 
Austenitic (Cont'd) 



A 240 



A 240 



317 

317 

317L 

317L 

321 

321 

347 

347 

348 

348 

XM-15 

XM-15 



(A09) A 240 
(A09) 
(A09) 
(A09) 



Ferritic/Martensitic 





A 240 


405 

410 

410S 

429 




A 240 


430 

XM-27 

XM-33 




Ferritic/Austenitic 




A 240 


S31803 


(AOS) 




S32205 


(A08) 


Forgings 


S32750 




Austenitic 




A 182 


F44 
F44 




A 182 


F304 
F304 
F304 
F304 




A 182 


F304H 
F304H 
F304H 
F304H 




A 182 


F304L 
F304L 
F304N 
F304N 



S31700 


18Cr-13Ni-3Mo 


8 


(1) (10X11) 


S31700 


18Cr-13Ni~3Mo 


8 


(1)(9)(10)(11) 


S31703 


18Cr-13Ni-3Mo 


8 


(1) 


S31703 


18Cr-13Ni-3Mo 


8 


(D(9) 


S32100 


ISCr-lONi-Tr 


8 


(10) (11) 


S32100 


ISCr-lONi-Ti 


8 


(9X10XH) 


S34700 


18Cr-10Ni-Cb 


8 


(10) (11) 


S34700 


18Cr-10Ni-Cb 


8 


(9)(10)(11) 


S34800 


18Cr-10Ni-Cb 


8 


(lXioXii) 


S34800 


18Cr-10Ni-Cb 


8 


(1) (9) (10)(11) 


S38100 


18Cr-8NI-2Si 


8 


(1) 


S38100 


18Cr-8Ni-2Si 


8 


(D(9) 


S31254 


20Cr-18Ni-6Mo 


8 


(1) 


S31254 


20Cr-18Ni-6Mo 


8 


(0(9) 


S31254 


20Cr~18Ni-6Mo 


8 


(1) 


S31254 


20Cr-18Ni-6Mo 


8 


(0(9) 


S32550 


25.5Cr-5.5Ni-3.5Mo-2Cu 


10H 


(0(35X36) 


S40500 


12Cr-lAl 


7 


(3) 


S41000 


13Cr 


6 


(0 


S41008 


13Cr 


7 


(0 


S42900 


15Cr 


6 


(0(3) 


S43000 


17Cr 


7 


(0(3) 


S44627 


26Cr-lMo 


101 


(0(3) 


S44626 


27Cr-lMo-Ti 


10! 


(2) 


S31803 


22Cr-5.5Ni-3Mo-N 


10H 


(0(33X34) 


S32205 


22Cr-5.5Ni-3Mo-N 


10H 


(0(33X34) 


S32750 


25Cr-7Ni-4Mo-N 


10H 


(0(33X39) 



S31254 


20Cr-18Ni-6Mo 


S31254 


20Cr-18Ni-6Mo 


S30400 


18Cr-8Ni 


S30400 


18Cr-8Ni 


S30400 


18Cr-8Ni 


S30400 


18Cr-8Ni 


S30409 


18Cr-~8Ni 


S30409 


18Cr~8Ni 


S30409 


18Cr-8Ni 


S30409 


18Cr-8Ni 


S30403 


18Cr-8Ni 


S30403 


ISCr-SNi 


S30451 


18Cr-~8Ni-N 


S30451 


18Cr-8Ni-N 



(0 

(0(9) 

(10)(12) 
(9)(10)(12) 
(10) 
(9)(10) 

(12) 
(9)(12) 

(9) 

(0 

(0(9) 
(10) 
(9)(10) 



75 
75 
75 
75 
75 
75 

75 
75 
75 
75 
75 
75 

95 

95 

100 

100 

110 



60 
65 
60 
65 

65 
65 



90 

90 

116 



30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


45 


1.00 


45 


1.00 


45 


1.00 


45 


1.00 


80 


1.00 


25 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


40 


1.00 


45 


1.00 


65 


1.00 


65 


1.00 


80 


1.00 



94 


44 


1.00 


94 


44 


1.00 


70 


30 


1.00 


70 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


70 


30 


1.00 


70 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


65 


25 


1.00 


65 


25 


1,00 


80 


35 


1.00 


80 


35 


1.00 



144 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



Plate, Sheet, and Strip (Cont'd) 
Austenitic (Cont'd) 



20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


317 


A 240 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


317 






20.0 


17.0 


15.2 


14.0 


13.1 


12.5 


12.2 


12.0 


11.7 


11.5 


11.3 
















317L 






20.0 


20.0 


19.6 


18.9 


17.7 


16.9 


16.5 


16.2 


15.8 


15.5 


15.2 
















317L 






20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


321 






20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


1 6.2 


9.6 


6.9 


5.0 


3.6 


321 






20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


347 


A 240 




20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


347 






20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


348 






20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


348 






20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 










XM-15 






20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 










XM-15 






27.1 


24.5 


21.9 


20.2 


19.1 


18.3 


18.0 


17.8 


17.7 






















A 240 


(A09) 


27.1 


27.1 


25.8 


24.6 


23.7 


23.2 


23.1 


23.0 


22.9 
























(A09) 


28.6 


24.5 


21.9 


20.2 


19.1 


18.3 


18.0 


17.8 


17.7 
























(A09) 


28.6 


28.6 


27.2 


25.9 


25.0 


24.4 


24.3 


24.1 


23.9 
























(A09) 


31.4 


31.3 


29.5 


28.6 


28.2 




































































Ferritic/Martensitic 




16.7 


15.3 


14.8 


14.5 


14.3 


14.0 


13.8 


13.5 






















405 


A 240 




18.6 


18.4 


17.8 


17.4 


17.2 


16.8 


16.6 


16.2 


15.7 


15.1 


14.4 


12.3 


8.8 


6.4 


4.4 


2.9 


1.8 


1.0 


410 






17.1 


17.1 


16.8 


16.5 


16.3 


15.9 


15.6 


15.2 


14.7 


14.1 


13.4 


12.3 


8.8 


6.4 


4.4 


2.9 


1.8 


1.0 


410S 






18.6 


18.4 


17.8 


17.4 


17.2 


16.8 


16.6 


16.2 


15.7 


15.1 


14.4 


12.0 


9.2 


6.5 


4.5 


3.2 


2.4 


1.8 


429 






18.6 


18.4 


17.8 


17.4 


17.2 


16.8 


16.6 


16.2 


15.7 


15.1 


14.4 


12.0 


9.2 


6.5 


4.5 


3.2 


2.4 


1.8 


430 


A 240 




18.6 


18.6 


18.3 


18,1 


18.1 


18.1 


18.1 
























XM-27 






19.4 


19.4 


19.3 


19.0 


18.8 


18.4 


18.1 
























XM-33 










































Femtic/Austenitic 




25.7 


25.7 


24.8 


23.9 


23.3 


23.1 


























S31803 


A 240 




25.7 


25.7 


24.8 


23.9 


23.3 


23.1 


























S32205 




(A08) 


33.1 


33.0 


31.2 


30.1 


29.6 


29.4 


























S32750 


Forgings 


(A08) 






































Austenitic 




26.9 


23.9 


21.4 


19.8 


18.6 


17.9 


17.6 


17.4 


17.3 




















F44 


A 182 




26.9 


26.9 


25.5 


24.3 


23.5 


23.0 


22.8 


22.7 


22.6 




















F44 






20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


F304 


A 182 




20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14,6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


F304 






20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


F304 






20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


F304 






20.0 


16.7 


15.0 


13.8 


12.9 


12,3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


F304H 


A 182 




20.0 


18.9 


17.7 


17.1 


16.9 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


F304H 






20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7. 7 


6.1 


F304H 






20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14,0 


12.4 


9.8 


7.7 


6.1 


F304H 






16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















F304L 


A 182 




16.7 


16.7 


16.2 


15.6 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















F304L 






22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


F304N 






22.9 


22.9 


21.7 


20,3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


F304N 







145 



Copyright © 2009 by the American Society of Mechanical Engineers. 
^ No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2G09 



Table A-3 Stainless Steels (Cont'd) 

















Specified 


Specified 










UNS 








Minimum 


Minimum 


£ 


Spec. 


Type or 




Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Class 


No. 


Composition 


No. 


Notes 


ksi 


ksi 


F 



Forgings (Cont'd) 
Austenitic (Cont'd) 

A 182 



A 182 



A 182 



A 182 



A 182 



A 182 



A 182 



A 182 



A 182 



A 182 



F310 
F310 
F310 
F310 

F316 

F316 
F316 
F316 

F316H 
F316H 
F316H 
F316H 

F316L 
F316L 

F316N 
F316N 

F321 
F321 
F321 
F321 

F321H 
F321H 
F321H 
F321H 

F347 
F347 
F347 
F347 

F347H 
F347H 
F347H 
F347H 

F348 
F348 

F348 
F348 



S30815 


21Cr-llNi- 


-N 


530815 


21Cr-llNi- 


-N 


S31000 


25Cr~20Ni 




531000 


25Cr-20NI 




S31000 


25Cr-20Ni 




531000 


25Cr-20Ni 




S31600 


16Cr-12Ni- 


-2Mo 


531600 


16Cr-12Ni- 


-2Mo 


531600 


16Cr-12Ni- 


-2Mo 


531600 


16Cr-12Ni- 


-2Mo 


531609 


16Cr-12Ni 


-2Mo 


531609 


16Cr-12Ni 


-2Mo 


S31609 


16Cr-12Ni 


-2Mo 


S31609 


16Cr-12Ni 


-2Mo 


531603 


16Cr~12Ns 


-2Mo 


S31603 


16Cr-12Ni 


-2Mo 


531651 


16Cr-12Ni 


-2Mo-N 


S31651 


16Cr-12Ni 


-2Mo-N 


S32100 


18Cr-10Ni 


-Ti 


S32100 


18Cr-10Ni 


-Ti 


S32100 


18Cr-10Ni 


-Ti 


S32100 


18Cr-10Ni 


-Ti 


S32109 


18Cr-10Ni 


-Ti 


S32109 


18Cr-10Ni 


-Ti 


S32109 


ISCr-lONi 


-Ti 


S32109 


18Cr-10Ni 


-Ti 


S34700 


ISCr-lONi 


-Cb 


534700 


18Cr-10Ni 


-Cb 


534700 


18Cr-10Ni 


-Cb 


534700 


ISCr-lONi 


-Cb 


S34709 


18Cr~10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


534800 


18Cr~10Ni 


-Cb 


S34800 


18Cr~10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 



(1) 

(D(9) 

(D(10)(14) 
(1)(9)(10)(14) 
(1X10X15) 
(1) (9) (10) (15) 

(10X12) 
(9X10X12) 
(10) 
(9X10) 

(12) 
(9) (12) 

(9) 

(0(37) 
(1X9X37) 
(10) 
(9X10) 

(12) 
(9) (12) 
(10) 
(9) (10) 

(12) 
(9) (12) 

(9) 

(12) 
(9) (12) 
(10) 
(9X10) 

(12) 
(9) (12) 

(9)' 

(12) 
(9) (12) 
(10) 
(9X10) 



87 
87 

75 
75 
75 
75 

70 
70 
75 

75 

70 
70 
75 
75 

70 
70 
80 
80 

70 
70 
75 
75 

70 
70 
75 
75 

70 
70 
75 
75 

70 
70 
75 
75 

70 
70 
75 
75 



45 


1.00 


45 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


25 


1.00 


25 


1.00 


35 


1.00 


35 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 



146 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASMEB31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 







































Forgings (Cont'd) 




































Austen (tic (Cont'd) 


24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17,4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 182 


24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


20.3 


20.0 


19.1 


14.9 


11.6 


9.0 


6.9 


5.2 






20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9.9 


7.1 


5.0 


3.6 


2.5 


F310 


A 182 


20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


9.9 


7.1 


5.0 


3.6 


2.5 


F310 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9,9 


7.1 


5.0 


3.6 


2.5 


F310 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


9.9 


7.1 


5.0 


3.6 


2.5 


F310 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


F316 


A 182 


20,0 


20.0 


19.4 


19.2 


18,0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


F316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


F316 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15,4 


15.3 


15.1 


12.4 


9.8 


7.4 


F316 




20.0 


17.3 


15.6 


14.3 


13,3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


F316H 


A 182 


20.0 


20.0 


19.4 


19.2 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


F316H 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


F316H 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


F316H 




16.7 


14.1 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


8.9 


8.8 


8.0 


7.9 


6.5 


6.4 


F316L 


A 182 


16.7 


16.7 


16.7 


15.6 


14.8 


14.0 


13.8 


13.5 


13.2 


13.0 


12.7 


12.4 


12.0 


11.9 


10.8 


10.2 


8.8 


6.4 


F316L 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12.9 


12.3 


9.8 


7.4 


F316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


12.3 


9.8 


7.4 


F316N 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


F321 


A 182 


20.0 


19.0 


17.8 


17.5 


17.5 


17.5 


17.5 


17.5 


17.2 


16.9 


16,7 


16.5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


F321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12,6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


F321 




20,0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


9.6 


6.9 


5.0 


3.6 


F321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


F321H 


A 182 


20.0 


19.0 


17.8 


17.5 


17.5 


17.5 


17.5 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


12.3 


9.1 


6.9 


5.4 


F321H 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


F321H 




20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


123 


9.1 


6.9 


5.4 


F321H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


F347 


A 182 


20.0 


19.1 


17.6 


16.6 


16.0 


15.8 


15.7 


15.7 


15.7 


15.7 


15.7 


15.6 


15.5 


15.3 


12.1 


9.1 


6.1 


4.4 


F347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


F347 




20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


F347 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


F347H 


A 182 


20.0 


19.1 


17.6 


16.6 


16.0 


15.7 


15.7 


15.7 


15.7 


15.7 


15.7 


15.6 


15.5 


15.3 


15.1 


14.1 


10.5 


7.9 


F347H 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


13.4 


13.3 


10.5 


7.9 


F347H 




20.0 


20.0 


18.8 


17.8 


17.1 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.4 


16.2 


14.1 


10.5 


7.9 


F347H 




20.0 


18.4 


17,1 


16.0 


15.0 


14.3 


14.0 


13.8 


13.7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


F348 


A 182 


20.0 


19.1 


17.6 


16.6 


16.0 


15.8 


15.7 


15.7 


15.7 


15.7 


15.7 


15.6 


15.5 


15.3 


12.1 


9.1 


6.1 


4.4 


F348 




20.0 


18.4 


17.1 


16.0 


15.0 


14.3 


14.0 


13.8 


13,7 


13.6 


13.5 


13.4 


13.4 


13.4 


12.1 


9.1 


6.1 


4.4 


F348 




20.0 


20.0 


18.8 


17.8 


17.2 


16.9 


16.8 


16.8 


16.8 


16.8 


16.8 


16.7 


16.6 


16.0 


12.1 


9.1 


6.1 


4.4 


F348 





147 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 















Specified 


Specified 








UNS 








Minimum 


Minimum 


£ 


Spec. 


Type or 


Alloy 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade Class No. 


Composition 


No. 


Notes 


ksi 


ksi 


F 


Forgings (Cont'd) 
















Austenitic (Cont'd) 
















A 182 


F348H 


S34809 


18Cr-10N!~Cb 


8 


(12) 


70 


30 


1.00 




F348H 


S34809 


18Cr-10Ni-Cb 


8 


(9) (12) 


70 


30 


1.00 




F348H 


S34809 


18Cr-10Ni-Cb 


8 




75 


30 


1.00 




F348H 


S34809 


18Cr-10Ni-Cb 


8 


(9) 


75 


30 


1.00 


Ferritic/Martensitic 
















A 182 


FXM-27Cb 


S44627 


27O-1M0 


10! 


(2) 


60 


35 


1.00 


A 336 


FXM-27Cb 


S44627 


27Cr-lMo 


10! 


(2) 


60 


35 


1.00 


Ferrltic/Austenitic 
















A 182 


F51 


S31803 


22Cr-5.5Ni-3Mo-N 


10H 


(1X33X34) 


90 


65 


1.00 


(A08) 


F60 


S32205 


22Cr~5.5Ni-3Mo-N 


10H 


(1)03X34) 


95 


70 


1.00 


(A08) 


F53 


S32750 


25Cr-7Ni-4Mo-N 


10H 


(D(33)(39) 


116 


80 


1.00 


Fittings (Seamless and Welded) 














Austenitic 
















A 403 


WP304 


S30400 


18Cr-8Ni 


8 


(1)(4)(7)(10)(11) 


75 


30 


1.00 




WP304 


S30400 


18Cr-8Ni 


8 


(1)(4)(7)(9)(10)(11) 


75 


30 


1.00 




WP304H 


S30409 


18Cr-8Ni 


8 


(1X4X7X11) 


75 


30 


1.00 




WP304H 


S30409 


18Cr~8Ni 


8 


(1X4X7X9X11) 


75 


30 


1.00 


A 403 


WP304L 


S30403 


18Cr-8Ni 


8 


(1X7X11) 


70 


25 


1.00 




WP304L 


S30403 


18Cr-8Ni 


8 


(1) (7) (9)(11) 


70 


25 


1.00 




WP304N 


S30451 


18Cr-8Ni-N 


8 


(1)(4X7)(10) 


80 


35 


1.00 




WP304N 


S30451 


18Cr-8Ni-N 


8 


(1X4X7X9X10) 


80 


35 


1.00 


A 403 


WP309 


S30900 


23Cr-12Ni 


8 


(1)(7)(10)(11) 


75 


30 


1.00 




WP309 


S30900 


23Cr-12Ni 


8 


(1)(7X9X10)(11) 


75 


30 


1.00 




WP310 


S31000 


23Cr-20Ni 


8 


(1X7X10X11X14) 


75 


30 


1.00 




WP310 


S31000 


23Cr-20Ni 


8 


(1X7X9X10X11X14) 


75 


30 


1.00 




WP310 


S31000 


23Cr-20Ni 


8 


(1)(7)(10)(11)(15) 


75 


30 


1.00 




WP310 


S31000 


23Cr-20Ni 


8 


(1X7X9X1 o)(ii)(i 5) 


75 


30 


1.00 


(A09) A 403 


WPS31254 . 


S31254 


20Cr-18Ni~6Mo 


8 


(1X7) 


94 


44 


1.00 


(A09) 


WPS31254 . 


S31254 


20Cr-18Nt-6Mo 


8 


(1X7X9) 


94 


44 


1.00 


A 403 


WP316 


S31600 


16Cr--12Ni~2Mo 


8 


(4)(7)(10)(11) 


75 


30 


1.00 




WP316 


S31600 


16Cr-12Ni~2Mo 


8 


(4) (7) (9) (10) (11) 


75 


30 


1.00 




WP316H 


S31609 


16Cr-12Ni-2Mo 


8 


(4)(7)(11) 


75 


30 


1.00 




WP316H 


S31609 


16Cr-12Ni-2Mo 


8 


(4) (7) (9) (11) 


75 


30 


1.00 


A 403 


WP316L 


S31603 


16Cr-12N'i-2Mo 


8 


(1X7X11) 


70 


25 


1.00 




WP316L 


S31603 


16Cr-12Ni-2Mo 


8 


(1)(7)0)(11) 


70 


25 


1.00 




WP316N 


S31651 


16Cr-12Ni-2Mo~N 


8 


(1)(7)(10) 


80 


35 


1.00 




WP316N 


S31651 


16Cr-12Ni-2Mo-N 


8 


(1X7X9X10) 


80 


35 


1.00 


A 403 


WP317 


S31700 


18Cr-13Ni-3A/lo 


8 


(i)(7)(ioXii) 


75 


30 


1.00 




WP317 


S31700 


18Cr-13Ni-3Mo 


8 


(1) (7) (9) (10) (11) 


75 


30 


1.00 




WP321 


S32100 


18Cr-10Ni-Ti 


8 


(4) (7) (10) (11) 


75 


30 


1.00 




WP321 


S32100 


18Cr~10Ni-Ti 


8 


(4X7X9X10X11) 


75 


30 


1.00 




WP321H 


S32109 


18Cr-10Ni-Ti 


8 


(4) (7) (11) 


75 


30 


1.00 




WP321H 


S32109 


18Cr-10Ni-Ti 


8 


(4) (7) (9) (11) 


75 


30 


1.00 



148 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



A5ME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



13.4 


13.4 


13.3 


10.5 


7.9 


F348H 


153 


15.1 


14.1 


10.5 


7.9 


F348H 


13.4 


13.4 


13.3 


10.5 


7.9 


F348H 


16.4 


16.2 


14.1 


10.5 


7.9 


F348H 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 

Forgings (Cont'd) 
Austenitic (Cont'd) 

20.0 18.4 17.1 16.0 15.0 14.3 14.0 13.8 13.7 13.6 13.5 13.4 13.4 13.4 13.4 13.3 10.5 7.9 F348H A 182 

20.0 19.1 17.6 16.6 16.0 15.7 15.7 15.7 15.7 15.7 15.7 15.6 15.5 

20.0 18.4 17.1 16.0 15.0 14.3 14.0 13.8 13.7 13.6 13.5 13.4 13.4 

20.0 20.0 18.8 17.8 17.1 16.9 16.8 16.8 16.8 16.8 16.8 16.7 16.6 

Ferritic/Martensitic 

17.1 17.1 16.6 16.1 16.1 16.1 16.1 FXM-27Cb A 182 

17.1 17.1 16.6 16.1 16.1 16.1 16.1 FXM-27Cb A 336 

Ferritic/Austenitic 

25.7 25.7 24.8 23.9 23.3 23.1 F51 A 182 

27.1 27.1 26.2 25.2 24.6 24.3 F60 (A08) 

33.1 33.0 31.2 30.1 29.6 29.4 F53 (AQ8) 

Fittings (Seamless and Welded) 
Austenitic 

20.0 16.7 15.0 13.8 12.9 12.3 12.0 11.7 11.5 11.2 11.0 10.8 10.6 10.4 10.1 9.8 7.7 6.1 WP304 A 403 

20.0 20.0 18.9 18.3 17.5 16.6 16.2 15.8 15.5 15.2 14.9 14.6 14.3 14.0 12.4 9.8 7.7 6.1 WP304 

20.0 16.7 15.0 13.8 12.9 12.3 12.0 11.7 11.5 11.2 11.0 10.8 10.6 10.4 10.1 9.8 7.7 6.1 WP304H 

20.0 20.0 18.9 18.3 17.5 16.6 16.2 15.8 15.5 15.2 14.9 14.6 14.3 14.0 12.4 9.8 7.7 6.1 WP304H 

16.7 14.3 12.8 11.7 10.9 10.4 10.2 10.0 9.8 9.7 WP304L A 403 

16.7 16.7 16.7 15.8 14.7 14.0 13.7 13.5 13.3 13.0 WP304L 

22.9 19.1 16.7 15.1 14.0 13.3 13.0 12.8 12.5 12.3 12.1 11.8 11.6 11.3 11.0 9.8 7.7 6.1 WP304N 

22.9 22.9 21.7 20.3 18.9 17.9 17.5 17.2 16.9 16.6 16.3 16.0 15.6 15.2 12.4 9.8 7.7 6.1 WP304N 

20.0 17.5 16.1 15.1 14.4 13.9 13.7 13.5 13.3 13.1 12.9 12.7 12.5 9.9 7.1 5.0 3.6 2.5 WP309 A 403 

20.0 20.0 20.0 20.0 19.4 18.8 18.5 18.2 18.0 17.7 17.5 17.2 15.9 9.9 7.1 5.0 3.6 2.5 WP309 

20.0 17.6 16.1 15.1 14.3 13.7 13.5 13.3 13.1 12.9 12.7 12.5 12.3 9.9 7.1 5.0 3.6 2.5 WP310 

20.0 20.0 20.0 19.9 19.3 18.5 18.2 17.9 17.7 17.4 17.2 16.9 15.9 9.9 7.1 5.0 3.6 2.5 WP310 

20.0 17.6 16.1 15.1 14.3 13.7 13.5 13.3 13.1 12.9 12.7 12.5 12.3 9.9 7A 5.0 3.6 2.5 WP310 

20.0 20.0 20.0 19.9 19.3 18.5 18.2 17.9 17.7 17,4 17.2 16.9 15.9 9.9 7.1 5.0 3.6 2.5 WP310 

26.9 23.9 21.4 19.8 18.6 17.9 17.6 17.4 17.3 WPS31254A403 (A09) 

26.9 26.9 25.5 24.3 23.5 23.0 22.8 22.7 22.6 WPS31254 (A09) 

20.0 17.3 15.6 14.3 13.3 12.6 12.3 12.1 11.9 11.8 11.6 11.5 11.4 11.3 11.2 11.1 9.8 7.4 WP316 A 403 

20.0 20.0 20.0 19.3 18,0 17.0 16.6 16.3 16.1 15.9 15.7 15.6 15.4 15.3 15.1 12.4 9.8 7.4 WP316 

20.0 17.3 15.6 14.3 13.3 12.6 12.3 12.1 11.9 11.8 11.6 11.5 11.4 11.3 11.2 11.1 9.8 7.4 WP316H 

20.0 20.0 20.0 19.3 18.0 17.0 16.6 16.3 16.1 15.9 15.7 15.6 15.4 15.3 15.1 12.4 9.8 7.4 WP316H 

16.7 14.1 12.7 11.7 10.9 10.4 10.2 10.0 9.8 9.6 9.4 9.2 8.9 8.8 8.0 7.9 6.5 6.4 WP316L A 403 

16.7 16.7 16.0 15.6 14.8 14.0 13.8 13.5 13.2 13.0 12.7 12.4 12.0 11.9 10.8 10.2 8.8 6.4 WP316L 

22.9 20.7 19.0 17.6 16.5 15.6 15.2 14.9 14.5 14.2 13.9 13.7 13.4 13.2 12.9 12.3 9.8 7.4 WP316N 

22.9 22.9 22.0 21.5 21.2 21.0 20.5 20.0 19.6 19.2 18.8 18.5 18.1 17.8 15.8 12.3 9.8 7.4 WP316N 

20.0 17.3 15.6 14.3 13.3 12.6 12.3 12.1 11.9 11.8 11.6 11.5 11.4 11.3 11.2 11.1 9.8 7.4 WP317 A 403 

20.0 20.0 20.0 19.3 18.0 17.0 16.6 16.3 16.1 15.9 15.7 15.6 15.4 15.3 15.1 12.4 9.8 7.4 WP317 

20.0 18.0 16.5 15.3 14.3 13.5 13.2 13.0 12.7 12.6 12.4 12.3 12.1 12.0 9.6 6.9 5.0 3.6 WP321 

20.0 20.0 19.1 18.7 18.7 18.3 17.9 17.5 17.2 16.9 16.7 16.5 16.4 16.2 9.6 6.9 5.0 3.6 WP321 

20.0 18.0 16.5 15.3 14.3 13.5 13.2 13.0 12.7 12.6 12.4 12.3 12.1 12.0 11.9 9.1 6.9 5.4 WP321H 

20.0 20.0 19.1 18.7 18.7 18.3 17.9 17.5 17.2 16.9 16.7 16.5 16.4 16.2 12.3 9.1 6.9 5.4 WP321H 



149 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 









UNS 






Spec. 


Type or 




Alloy 


Nominal 


p. 


No. 


Grade 


Class 


No. 


Composition 


No. 



Notes 



Specified Specified 

Minimum Minimum £ 

Tensile, Yield, or 

ksi ksi F 



(A08) 



Fittings (Seamless and Welded) (Cont'd) 
Austenitic (Cont'd) 

A 403 WP347 
WP347 
WP347H 
WP347H 

A 403 WP348 
WP348 
WP348H 
WP348H 

Ferritic/Austenitic 

A 815 S31803 
S32205 



S34700 


18Cr-10Ni 


-Cb 


S34700 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34709 


18Cr-10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 


S34800 


18Cr-10Ni 


-Cb 


S34809 


18Cr-10Ni 


-Cb 


S34809 


18Cr-10Ni 


-Cb 


S31803 


22Q-5.5N 


~3Mo-N 


S32205 


22Cr-5,5N 


-3Mo-N 



(4) (7) (10) (11) 
(4) (7) (9) (10) (11) 
(4) (7) (11) 
(4) (7) (9) (11) 

(4) (7) (10) (11) 
(4)(7)(9)(10)(11) 
(4) (7) (11) 
(4) (7) (9) (11) 



10H (1)03)(34) 
10H (1)(33)(34) 



75 
75 
75 
75 

75 
75 
75 
75 



90 
95 



30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


30 


1.00 


65 


1.00 


70 


1.00 



Castings 
Austenitic 



A 351 



A 351 



CF3 

CF3 

CF3A 

CF3A 

CF3M 

CF3M 

CF8 

CF8 

CF8C 

CF8C 

CF8M 

CF8M 



A 351 CH8 
CHS 
CH20 
CH20 
CK20 
CK20 



J92500 


18Cr-8Ni 




J92500 
J92500 
J92500 


18Cr-8Ni 
ISCr-SNi 
18Cr-8Ni 




J92800 


18Cr-12Ni- 


-2Mo 


J92800 


18Cr~12Ni- 


-2Mo 


J92600 


18Cr-8Ni 




J92600 


ISCr-SNi 




J92710 


18Cr-10Ni- 


-Cb 


J92710 


18Cr-10Ni- 


-Cb 


J92900 


16Cr-12Ni 


-2Mo 


J92900 


16Cr-12Ni 


-2Mo 


J93400 


25Cr-12Ni 




J93400 


25Cr-12Ni 




J93402 


25Cr-12Ni 




J93402 


25Cr-12Ni 




J94202 


25Cr-20Ni 




J94202 


25Cr-20Ni 





(1)(5)(26) 


70 


30 


0.80 


(1)(5)(9)(26) 


70 


30 


0.80 


(0(5X26) 


77.5 


35 


0.80 


(0(5X9X26) 


77.5 


35 


0.80 


(0(5) (13) (26) 


70 


30 


0.80 


(0(5) (9) (13) (26) 


70 


30 


0.80 


(5)(10)(26) 


70 


30 


0.80 


(5) (9) (10) (26) 


70 


30 


0.80 


(0(5X10X26) 


70 


30 


0.80 


(0(5)(9)(10X26) 


70 


30 


0.80 


(5)(13)(26) 


70 


30 


0.80 


(5X9)(13)(26) 


70 


30 


0.80 


(0(5X10X26) 


65 


28 


0.80 


(0(5) (9) (10) (26) 


65 


28 


0.80 


(0(5) (10) (2 6) 


70 


30 


0.80 


(O(5)(9)(10)(26) 


70 


30 


0.80 


(1)(5)(10)(26) 


65 


28 


0.80 


(O(5)0)(1O)(26) 


65 


28 


0.80 



Ferritic/Martensitic 

A 217 CA15 



J91150 13Cr-V 2 Mo 



(0(3X5) 



90 



65 



0.80 



Bolts, Nuts, and Studs 
Austenitic 



A 193 



A 193 



B8C 

B8M 

88T 



S30400 


18Cr-8Ni 




S34700 


18Cr-10Ni 


-Cb 


S31600 


16Cr-12Ni 


-2Mo 


S32100 


18Cr-10Ni 


-Ti 


S30400 


18Cr-8Ni 




S30400 


18Cr-8Ni 




S30400 


18Cr-8Ni 




S30400 


18Cr-8Ni 





(10)(11)(16) 


75 


30 


(10X10(16) 


75 


30 


(10)(11)(16) 


75 


30 


(10) (11) (16) 


75 


30 


(16) (18) (20) 


125 


100 


(16) (18) (21) 


115 


80 


(16) (18) (22) 


105 


65 


(16)(18)(23) 


100 


50 



150 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-3 Stainless Steels (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



Bolts, Nuts, and Studs (Cont'd) 
Austenitic (Cont'd) 



25.0 
20.0 

18.8 
18.8 



22.0 22.0 22.0 

20.0 20.0 20.0 

18.8 17.7 16.3 

18.8 17.7 15.6 



22.0 
20.0 
16.3 
14.3 



22,0 
20.0 
16.3 

13.3 



22.0 
20.0 
16.3 
12.6 



22.0 22.0 22.0 

20.0 20.0 20.0 

16.3 16.3 16.3 

12.5 12.5 12.5 



25.0 

20.0 

18.8 

18.8 

18.8 ... 

18.8 16.7 15.0 13.8 

18.8 

18.8 

20.0 

25.0 

18.8 

18.8 18.4 17.1 16.0 

18.8 

18.8 

20.0 

25.0 

18.8 

18.8 17.7 15.6 14.3 

18.8 

18.8 

20.0 

22.0 

18.8 

18,8 17.8 16.5 15.3 

18.8 ... 

18.8 

20.0 

25.0 



B8C 
B8C 
B8C 
B8C 

B8M 
B8M 
B8M 
B8M 

B8T 
B8T 
B8T 
B8T 



8C 

8M 
8T 
8F 



A 193 



A 193 



A 193 



A 194 



A 194 



A 320 



B8C 
B8C 
B8C 
B8C 
B8C 
B8C 

B8M 
B8M 
B8M 
B8M 
B8M 
B8M 

B8T 
B8T 
B8T 
B8T 
B8T 
B8T 



A 320 



A 320 



A 320 



153 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A-3 Stainless Steels (Cont'd) 









UNS 






Spec. 


Type or 




Alloy 


Nominal 


P- 


No. 


Grade 


Class 


No. 


Composition 


No. 



Notes 



Specified Specified 

Minimum Minimum £ 

Tensile, Yield, or 

ksi ksi F 



Bolts, Nuts, and Studs (Cont'd) 
Austenitic (Cont'd) 



(A08) A 453 


660 A & B S66286 


15Cr-25Ni~Mo-Ti-V~B 




(16) 


130 


85 




A 479 


309H 


530909 


23Cr-12Ni 


8 


(9) 


75 


30 






309H 


S30909 


23Cr-12Ni 


8 




75 


30 






310H 


531009 


25Cr~20Ni 


8 


(9) 


75 


30 






310H 


531009 


25Cr-20Ni 


8 




75 


30 




A 564 


630 H1100 S17400 


17Cr-4Ni-3.5Cu-0.04P 




(16)(24) 


140 


115 




Ferritic/Martensitic 
















A 193 


B6 (410) S41000 


13Cr 




(16)(19) 


110 


85 




A 194 


6 


541000 


13Cr 




(17) 








Bar 


















Austenitic 
















A 479 


304 


S30400 


18Cr-8Ni 


8 


(10) 


75 


30 


1.00 




304 


530400 


18Cr-8Ni 


8 


(9)(10) 


75 


30 


1.00 




304H 


530409 


18Cr-8Ni 


8 




75 


30 


1.00 




304H 


S30409 


18Cr-8Ni 


8 


'(9) 


75 


30 


1.00 


A 479 


304L 


S30403 


18Cr-8Ni 


8 


(25) 


70 


25 


1.00 




304L 


S30403 


18Cr-8Ni 


8 


(9)(25) 


70 


25 


1.00 




304N 


S30451 


18Cr-8Ni-N 


8 


(10) 


80 


35 


1.00 




304N 


S30451 


18Cr-8Ni-N 


8 


(9)(10) 


80 


35 


1.00 


A 479 




S30815 


21Cr-llNi-N 


8 


(1) 


87 


45 


1.00 






S30815 


21Cr-llNi-N 


8 


(D(9) 


87 


45 


1.00 


A 479 


310S 


S31008 


25Cr-20Nt 


8 


(10) (11) (15) 


75 


30 


1.00 




310S 


531008 


25Cr-20Ni 


8 


(10)(11)(14) 


75 


30 


1.00 




310S 


531008 


25Cr-20Ni 


8 


(9)(10)(11) 


75 


30 


1.00 


(A09) 




S31254 


20Cr-18Ni-6Mo 


8 


(1) 


95 


44 


1.00 


(A09) 




S31254 


20Cr-18Ni-6i\Ao 


8 


(D(9) 


95 


44 


1.00 


A 479 


316 


S31600 


16Cr-12Ni-2Mo 


8 


(10) 


75 


30 


1.00 




316 


S31600 


16Cr-12Ni-2Mo 


8 


(9)(10) 


75 


30 


1.00 




316H 


S31609 


16Cr-12Ni~2Mo 


8 




75 


30 


1.00 




316H 


S31609 


16Cr-12Ni-2Mo 


8 


(9) 


75 


30 


1.00 


A 479 


316L 


S31603 


16Cr-12Ni-2/V\o 


8 


(1X25X38) 


70 


25 


1.00 




316L 


531603 


16Cr-12Ni-2Mo 


8 


(1)(9)(25)(38) 


70 


25 


1.00 




316N 


S31651 


16Cr-12Ni-2Mo 


8 


(10) 


80 


35 


1.00 




316N 


S31651 


16Cr-12Ni-2Mo 


8 


(9) (10) 


80 


35 


1.00 


A 479 


321 


532100 


18Cr-10Ni-Ti 


8 


(10) 


75 


30 


1.00 




321 


S32100 


18Cr-10Ni-Ti 


8 


(9)(io) 


75 


30 


1.00 




321H 


S32109 


18Cr~10Ni-Ti 


8 




75 


30 


1.00 




321H 


S32109 


ISCr-lONi-Ti 


8 


(9) 


75 


30 


1.00 






532550 


25.5Cr-~5.5Ni-3.5A/lo-2Cu 


10H 


(1X35X36) 


110 


80 


1.00 



154 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.15-2009 



Table A-3 Stainless Steels (Cont'd) 



(07) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 Type 

to or Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 Grade No. 



































Bolts, 


Nuts, 


and Studs (Cont'd) 




































Austenitic (Cont'd) 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 


21.3 










660 


A 453 


20.0 


20.0 


20.0 


20.0 


19.4 


18.8 


18.5 


18.2 


18.0 


17.7 


17.5 


17.2 


16.9 


13.8 


103 


7.6 


5.5 


4.0 


309H 


A 479 


20.0 


17.5 


16.1 


15.1 


14.4 


13.9 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


10.3 


7.6 


5.5 


4.0 


309H 




20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12,7 


12.5 


12.3 


12.1 


10.3 


7.6 


5.5 


4.0 


310H 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


16.7 


13.8 


10.3 


7.6 


5.5 


4.0 


310H 




28.0 




































630 


A 564 



(A08) 



Ferritic/Martensitsc 



21.3 


19.5 


18.9 


18.5 


18.3 


17.9 


17.6 


17.2 


16.7 


16.1 


15.3 


123 














B6 
6 


A 193 
A 194 

Bar 






































Austenitic 


20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


304 


A 479 


20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6.1 


304 




20.0 


16.7 


15.0 


13.8 


12.9 


12.3 


12.0 


11.7 


11.5 


11.2 


11.0 


10.8 


10.6 


10.4 


10.1 


9.8 


7.7 


6.1 


304H 




20.0 


20.0 


18.9 


18.3 


17.5 


16.6 


16.2 


15.8 


15.5 


15.2 


14.9 


14.6 


14.3 


14.0 


12.4 


9.8 


7.7 


6 A 


304H 




16.7 


14.3 


12.8 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.7 


















304L 


A 479 


16.7 


16.7 


16.7 


15.8 


14.7 


14.0 


13.7 


13.5 


13.3 


13.0 


















304L 




22.9 


19.1 


16.7 


15.1 


14.0 


13.3 


13.0 


12.8 


12.5 


12.3 


12.1 


11.8 


11.6 


11.3 


11.0 


9.8 


7.7 


6.1 


304N 




22.9 


22.9 


21.7 


20.3 


18.9 


17.9 


17.5 


17.2 


16.9 


16.6 


16.3 


16.0 


15.6 


15.2 


12.4 


9.8 


7.7 


6.1 


304N 




24.9 


24.7 


22.0 


19.9 


18.5 


17.7 


17.4 


17.2 


17.0 


16.8 


16.6 


16.4 


16.2 


14.9 


11.6 


9.0 


6.9 


5.2 




A 479 


24.9 


24.7 


23.3 


22.4 


21.8 


21.4 


21.2 


21.0 


20.8 


20.6 


20.3 


20.0 


19.1 


14.9 


11.6 


9.0 


6.9 


5.2 






20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9.9 










310S 


A 479 


20.0 


17.6 


16.1 


15.1 


14.3 


13.7 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.3 


9.9 










310S 




20.0 


20.0 


20.0 


19.9 


19.3 


18.5 


18.2 


17.9 


17.7 


17.4 


17.2 


16.9 


15.9 


9.9 










310S 




26.9 


23.9 


21.4 


19.8 


18.6 


17.9 


17.6 


17.4 


17.3 






















(A09) 


26.9 


26.9 


25.5 


24.3 


23.5 


23.0 


22.8 


22.7 


22.6 






















(A09) 


20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


316 


A 479 


20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


316 




20.0 


17.3 


15.6 


14.3 


13.3 


12.6 


12.3 


12.1 


11.9 


11.8 


11.6 


11.5 


11.4 


11.3 


11.2 


11.1 


9.8 


7.4 


316H 




20.0 


20.0 


20.0 


19.3 


18.0 


17.0 


16.6 


16.3 


16.1 


15.9 


15.7 


15.6 


15.4 


15.3 


15.1 


12.4 


9.8 


7.4 


316H 




16.7 


14.1 


12.7 


11.7 


10.9 


10.4 


10.2 


10.0 


9.8 


9.6 


9.4 


9.2 


8.9 


8.8 


8.0 


7.9 


6.5 


6.4 


316L 


A 479 


16.7 


16.7 


16.0 


15.6 


14.8 


14.0 


13.8 


13.5 


13.2 


13.0 


12.7 


12.4 


12.0 


11.9 


10.8 


10.2 


8.8 


6.4 


316L 




22.9 


20.7 


19.0 


17.6 


16.5 


15.6 


15.2 


14.9 


14.5 


14.2 


13.9 


13.7 


13.4 


13.2 


12,9 


123 


9.8 


7.4 


316N 




22.9 


22.9 


22.0 


21.5 


21.2 


21.0 


20.5 


20.0 


19.6 


19.2 


18.8 


18.5 


18.1 


17.8 


15.8 


123 


9.8 


7.4 


316N 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


9.6 


6.9 


5.0 


3.6 


321 


A 479 


20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


14.9 


9.6 


6.9 


5.0 


3.6 


321 




20.0 


18.0 


16.5 


15.3 


14.3 


13.5 


13.2 


13.0 


12.7 


12.6 


12.4 


12.3 


12.1 


12.0 


11.9 


9.1 


6.9 


5.4 


321H 




20.0 


20.0 


19.1 


18.7 


18.7 


18.3 


17.9 


17.5 


17.2 


16.9 


16.7 


16.5 


16.4 


16.2 


123 


9.1 


6.9 


5.4 


321H 




31.4 


31.3 


29.5 


28.6 


28.2 

































155 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A-3 Stainless Steels (Cont'd) 



Spec. 
No. 



Type or 
Grade 



Class 



UNS 

Alloy 

No. 



Nominal 
Composition 



P- 
No. 



Notes 



Specified Specified 

Minimum Minimum £ 

Tensile, Yield, or 

ksi ksi F 



Bar (Cont'd) 
Austenitic (Cont'd) 

A 479 347 
347 
347H 
347H 

A 479 348 
348 
348H 
348H 

Ferritic/Martensitic 

A 479 XM-27 

Ferritic/Austenitic 
A 479 S31803 



S34700 18Cr-10Ni-Cb 

S34700 18Cr-10Ni-Cb 

S34709 18Cr~10Ni-Cb 

$34709 18Cr-10Ni-Cb 

S34800 18Cr~10Ni-Cb 

S34800 18Cr-10Ni-Cb 

S34809 18Cr-10Ni-Cb 

S34809 18Cr-10Ni-Cb 



S44627 27Cr-lMo 



S31803 22Cr-5.5Ni-3Mo-N 



101 



(10) 
(9)(10) 

(9) 

(10) 
(9) (10) 

(9) 



(2) 



75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 


75 


30 


1.00 



10H (1)03X34) 



65 



90 



40 



65 



1.00 



1.00 



GENERAL NOTES: 

(a) The tabulated specifications are ANSI/ASTM or ASTM. For ASME Boiler and Pressure Vessel Code applications, see related specifica- 
tions in Section I! of the ASME Code. 

(b) The stress values in this Table may be interpolated to determine values for intermediate temperatures. 

(c) The P-Numbers indicated in this Table are identical to those adopted by the ASME Boiler and Pressure Vessel Code. Qualification of 
welding procedures, welders, and welding operators is required and shall comply with the ASME Boiler and Pressure Vessel Code, Sec- 
tion IX, except as modified by para. 127.5. 

(d) Tensile strengths and allowable stresses shown in "ksi" are "thousands of pounds per square inch." 

(e) The materials listed in this Table shall not be used at design temperatures above those for which allowable stress values are given 
herein or in Table A-8. 

(f) The tabulated stress values are 5 x E (weld joint efficiency factor) or 5 x F (material quality factor), as applicable. Weld joint effi- 
ciency factors are shown in Table 102.4.3. 

(g) Pressure-temperature ratings of piping components, as published in standards referenced in this Code, may be used for components 
meeting the requirements of those standards. The allowable stress values given in this Table are for use in designing piping compo- 
nents which are not manufactured in accordance with referenced standards. 

(h) The tabulated stress values that are shown in italics are at temperatures in the range where creep and stress rupture strength govern 

the selection of stresses. 
NOTES: 

(1) THIS MATERIAL IS NOT ACCEPTABLE FOR USE ON BOILER EXTERNAL PIPING - SEE FIGS. 100.1.2(A) AND (B). 

(2) Use of this material at temperatures above 650°F is not approved because of the possibility of temper embrittlement. 

(3) This steel may be expected to develop embrittlement at room temperature after service at temperatures above 700°F. Consequently, 
its use at higher temperatures is not recommended unless due caution is observed. 

(4) For fittings made from A 182 forgings over 5 in. in thickness, the allowable stress values tabulated shall be reduced by the ratio of 
70 divided by 75. 

(5) The material quality factors and allowable stress values for these materials may be increased in accordance with para. 102.4.6. 

(6) Tensile strengths in parentheses are expected minimum values. 

(7) See MSS SP-43 for requirements for lightweight stainless steel fittings. MSS SP-43 Schedule 5S fittings shall not be used for design 
temperatures above 400°F. MSS SP-43 Schedule 10S fittings shall not be used for design temperatures above 750°F. 

(8) The material quality factor for centrifugalty cast pipe (0.85) is based on all surfaces being machined after heat treatment. The surface 
finish, after machining, shall be 250 jxin. arithmetic average deviation or smoother. 



156 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-4 begins on the next page. 



159 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A-4 Nickel and High Nickel Alloys 





UNS 








Spec. 


Alloy 


Temper or 


Nominal 


P- 


No. 


No. 


Condition 


Composition 


No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


£ 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Seamless Pipe and Tube 



B 161 


N02200 


Annealed 


Ni 








41 


0X5) 


55 


15 


1.00 




N02200 


Annealed 


Ni 








41 


(1X6) 


55 


12 


1.00 




N02200 


Str. rel. 


Ni 








41 


(1) 


65 


40 


1.00 


B 161 


N02201 


Annealed 


Ni-Low C 








41 


(DC) 


50 


12 


1.00 




N02201 


Annealed 


Ni-Low C 








41 


(1X6) 


50 


10 


1.00 




N02201 


Str. rel. 


Ni-Low C 








41 


(1) 


60 


30 


1.00 


B 163 


N08800 


Annealed 


Ni-Cr-Fe 








45 


(1X7) 


75 


30 


1.00 




N08800 


Annealed 


Ni-Cr-Fe 








45 


(1X2X7) 


75 


30 


1.00 




N08810 


Annealed 


Ni-Cr-Fe 








45 


(1) 


65 


25 


1.00 




N08810 


Annealed 


Ni-Cr-Fe 








45 


(1X2) 


65 


25 


1.00 


B 165 


N04400 


Annealed 


Ni-Cu 








42 


UX5) 


70 


28 


1.00 




N04400 


Annealed 


Ni-Cu 








42 


(0(6) 


70 


25 


1.00 




N04400 


Str. rel. 


Ni-Cu 








42 


(1)(2)(3) 


85 


35 


1.00 


B 167 


N06600 


H.F./ann. 


Ni-Cr-Fe 








43 


0X5) 


80 


30 


1.00 




N06600 


H.F./ann. 


Ni-Cr-Fe 








43 


(1)(2)(5) 


75 


30 


1.00 




N06600 


H.F./ann. 


Ni-Cr-Fe 








43 


(0(6) 


75 


25 


1.00 




N06600 


H.F./ann. 


Ni-Cr-Fe 








43 


(0(2X6) 


80 


25 


1.00 


B 167 


N06600 


C.D./ann. 


Ni-Cr-Fe 








43 


(0(5) 


80 


35 


1.00 




N066OO 


C.D./ann. 


Ni-Cr-Fe 








43 


(0(2) (5) 


80 


35 


1.00 




N06600 


C.D./ann. 


Ni-Cr-Fe 








43 


(0(6) 


80 


30 


1.00 




N06600 


CD./ann. 


Ni-Cr-Fe 








43 


(0(2X6) 


80 


30 


1.00 


B 167 


N06617 


Annealed 


52Ni-22Cr-13Co- 


9Mo 


43 


(0(7) 


95 


35 


1.00 




N06617 


Annealed 


52Ni-22Cr-13Co- 


9Mo 


43 


(0(2) (7) 


95 


35 


1.00 


B 407 


N08800 


C.D./ann. 


Ni-Cr-Fe 








45 


(7) 


75 


30 


1.00 




N08800 


C.D./ann. 


Ni-Cr-Fe 








45 


(2) (7) 


75 


30 


1.00 




N08810 


Annealed 


Ni-Cr-Fe 








45 


(7) 


65 


25 


1.00 




N08810 


Annealed 


Ni-Cr-Fe 








45 


(2X7) 


65 


25 


1.00 


B 423 


N08825 


C.W./ann. 


Ni-Fe-Cr- 


Mo- 


-Cu 




45 


(0(7) 


85 


35 


1.00 




N08825 


CW./ann. 


Ni-Fe-Cr- 


Mo- 


-Cu 




45 


(0(2) (7) 


85 


35 


1.00 


B 444 


N06625 


Sol. ann. 


Ni-Cr-Mo 


-cb 






43 


(0(14X18) 


100 


40 


1.00 




N06625 


Annealed 


Ni-Cr-Mo 


-Cb 






43 


(0(2X14) 


120 


60 


1.00 


B 622 


N06022 


Sol. ann. 


Ni-Mo-Cr 


-Low C 




44 


(0(12) 


100 


45 


1.00 




N06022 


Sol. ann. 


Ni-Mo-Cr 


-Low C 




44 


(0(2) (12) 


100 


45 


1.00 




N10276 


Sol. ann. 


Low C-Ni- 


-Mo 


-Cr 




43 


(0(12) 


100 


41 


1.00 




N10276 


Sol. ann. 


Low C-Ni- 


~Mo 


-Cr 




43 


(0(2) (12) 


100 


41 


1.00 


(A09) 


R30556 


Annealed 


Ni-Fe-Cr- 


Co- 


Mo- 


-W 


45 


(0 


100 


45 


1.00 


(A09) 


R30556 


Annealed 


Ni-Fe-Cr- 


Co- 


Mo- 


-W 


45 


(0(2) 


100 


45 


1.00 


B 677 


N08925 


Annealed 


Ni-Fe-Cr- 


Mo- 


-Cu- 


-Low C 


45 


(0 


87 


43 


1.00 




N08925 


Annealed 


Ni-Fe-Cr- 


Mo- 


-Cu- 


-Low C 


45 


(0(2) 


87 


43 


1.00 




N08926 


Annealed 


Ni-Fe-Cr- 


Mo- 


-Cu- 


-N-Low C 


45 


(0(1 9) (20) 


94 


43 


1.00 




N08926 


Annealed 


Ni-Fe~Cr- 


Mo- 


-Cu- 


-N-Low C 


45 


(0(2X19X20) 


94 


43 


1.00 



160 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-4 Nickel and High Nickel Alloys (07) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 UNS 

to Alloy Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 No. No. 





































Seamless Pipe ar 


id Tube 


10.0 


10.0 


10.0 


10.0 


10.0 


10.0 


























N02200 


B 161 


8.0 


8.0 


8.0 


8.0 


8.0 


8.0 


























N02200 




18.6 


18.6 


18.6 


18.6 


18.3 


17.7 


























N02200 




8.0 


7.7 


7.5 


7.5 


7.5 


7.5 


7.5 


7.4 


7.4 


7.2 


5.8 


4.5 


3.7 


3.0 


2.4 


2.0 


1.5 


1.2 


N02201 


B 161 


6.7 


6.4 


6.3 


6.2 


6.2 


6.2 


6,2 


6.2 


6.1 


6.0 


5.8 


4.5 


3.7 


3.0 


2.4 


2.0 


1.5 


1.2 


N02201 




17.1 


17.1 


17.0 


17.0 


16.8 


16.3 


























N02201 




20.0 


18.5 


17.8 


17.2 


16.8 


16.3 


16.1 


15.9 


15,7 


15.5 


15.3 


15.1 


14.9 


14.7 


14.5 


13.0 


9.8 


6.6 


N08800 


B 163 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


17.0 


13.0 


9.8 


6.6 


N08800 




16.7 


15.4 


14.4 


13.6 


12.9 


12.2 


11.9 


11.6 


11.4 


11.1 


10.9 


10.7 


10.5 


10.4 


10.2 


10.0 


9.3 


7.4 


N08810 




16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.1 


15.7 


15.3 


15.0 


14.7 


14.5 


14.2 


14.0 


13.8 


11.6 


9.3 


7.4 


N08810 




18.7 


16.4 


15.2 


14.7 


14.7 


14.7 


14.7 


14.6 


14.5 


14.3 


11.0 


8.0 














N04400 


B 165 


16.7 


14.6 


13.6 


13.2 


13.1 


13.1 


13.1 


13.0 


12.9 


12.7 


11.0 


8.0 














N04400 




24.3 


24.3 


24.3 


24.3 


24.3 




























N04400 




20.0 


19.1 


18.3 


17.5 


16.8 


16.2 


15.9 


15.7 


15.5 


15.2 


15.1 


14.9 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 


B 167 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




16.7 


15.9 


15.2 


14,6 


14.0 


13.5 


13.3 


13.1 


12.9 


12.7 


12.5 


12.4 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.7 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




22.9 


21.3 


20.8 


20.5 


20.2 


19.9 


19.8 


19.6 


19.4 


19.1 


18.7 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 


B 167 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.4 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




20.0 


19.1 


18.3 


17.5 


16.8 


16.2 


15.9 


15.7 


15.5 


15.2 


15.1 


14.9 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 




23.3 


20.8 


19.2 


18.1 


17.2 


16.6 


16.4 


16.2 


16.0 


15.9 


15.8 


15.7 


15.6 


15.5 


15.4 


15.4 


15.3 


15.3 


N06617 


B 167 


23.3 


23.3 


23.3 


23.3 


23.3 


22.5 


22.1 


21.9 


21.7 


21.5 


21.3 


21.2 


21.0 


20.9 


20.9 


20.8 


20.7 


18.1 


N06617 




20.0 


18.5 


17.8 


17.2 


16.8 


16.3 


16.1 


15.9 


15.7 


15.5 


15.3 


15.1 


14.9 


14.7 


14.5 


13.0 


9.8 


6.6 


N08800 


B 407 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


17.0 


13.0 


9.8 


6.6 


N08800 




16.7 


15.4 


14.4 


13.6 


12.9 


12.2 


11.9 


11.6 


11.4 


11.1 


10.9 


10.7 


10.5 


10.4 


10.2 


10.0 


9.3 


7.4 


N08810 




16.7 


16.7 


16.7 


16.7 


16.7 


16.5 


16.1 


15.7 


15.3 


15.0 


14.7 


14.5 


14.2 


14.0 


13.8 


11.6 


9.3 


7.4 


N08810 




23.3 


21.4 


20.3 


19.4 


18.5 


17.8 


17.5 


17.3 


17.2 


17.0 


















N08825 


B 423 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.2 


23,0 


















N08825 




26.7 


24.9 


23.6 


22.6 


21.8 


21.1 


20.8 


20.6 


20.3 


20.1 


20.0 


19.8 


19.7 


19.5 


19.4 


19.4 


19.3 


19.3 


N06625 


B 444 


34.3 


34.3 


34.3 


33.6 


32.9 


32.4 


32.1 


31.8 


31.5 


31.2 


30.9 


30.6 


30.3 


29.9 


29.5 


29.0 


21.0 


13.2 


N06625 




28.6 


26.7 


24.6 


22.9 


21.5 


20.4 


20.0 


19.6 


19.3 


19.0 


















N06022 


B 622 


28.6 


28.6 


28.2 


27.2 


26.5 


26.0 


25.8 


25.6 


25.4 


25,3 


















N06022 




27.3 


24.9 


23.0 


21.3 


19.9 


18.8 


18.2 


17.8 


17.4 


17.1 


16.9 


16.7 


16.6 


16.5 










N10276 




27.3 


27.3 


27.3 


27.3 


26.9 


25.2 


24.6 


24.0 


23.5 


23.1 


22.8 


22.6 


22.4 


22.3 










N10276 




28.6 


25.6 


23.1 


21.3 


20.1 


19.3 


18.9 


18.7 


18.4 


18.2 


18.0 


17.8 


17.6 


17.5 


17.3 


17.1 


16.9 


13.6 


R30556 


(A09) 


28.6 


28.6 


28.0 


27.1 


26.4 


26.0 


25.6 


25.2 


24.9 


24.6 


24.3 


24.1 


23.8 


23.6 


23.3 


21.2 


17.0 


13.6 


R30556 


(A09) 


24.9 


23.2 


21.3 


19.8 


18.3 


173 


17.0 


16.9 


16.9 


16.9 


















N08925 


B 677 


24.9 


24.9 


23.9 


23.0 


22.1 


21.4 


21.1 


20.8 


20.4 


20.1 


















N08925 




26.9 


24.1 


21.5 


19.7 


18.7 


18.0 


17.7 


17.5 


17.4 




















N08926 




26.9 


26.9 


26.2 


24.8 


23.7 


22.8 


22.4 


22.0 


21.6 




















N08926 





161 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 

















Specified 


Specified 








UNS 










Minimum 


Minimum 


f 




Spec. 


Alloy 


Temper or 


Nominal 


P- 




Tensile, 


Yield, 


or 




No. 


No. 


Condition 


Composition 


No. 


Notes 


ksi 


ksi 


F 




Seamless Pipe and Tube (Cont'd) 














(A08) 


B 690 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(D(8)(22) 


95 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1X2X8X22) 


95 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


UX21) 


100 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1X2X21) 


100 


45 


1.00 




B 729 


N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1) 


80 


35 


1.00 






N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1X2) 


80 


35 


1.00 




Welded Pipe and Tube 


















B 464 


N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1) 


80 


35 


0.85 






N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1)(2) 


80 


35 


0.85 




B 468 


N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1) 


80 


35 


0.85 






N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(1X2) 


80 


35 


0.85 




B 546 


N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


(1X7) 


95 


35 


0.85 






N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


(1)0X7) 


95 


35 


0.85 




B 619 


N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(D(12) 


100 


45 


0.85 






N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(1)(2)(12) 


100 


45 


0.85 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(1)(12) 


100 


41 


0.85 






N10276 


Sot. ann. 


Low C-Nf-Mo-Cr 


43 


(1X2X12) 


100 


41 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(1) 


100 


45 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(1X2) 


100 


45 


0.85 




B 626 


N06022 


Sol ann. 


Ni~~Mo™Cr-Low C 


44 


(1)02) 


100 


45 


0.85 






N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(1X2X12) 


100 


45 


0.85 






N10276 


Sol. ann. 


Low C-Ni~Mo-Cr 


43 


(1)(12) 


100 


41 


0.85 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(1X2X12) 


100 


41 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(1) 


100 


45 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(D(2) 


100 


45 


0.85 




B 673 


N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(1) 


87 


43 


0.85 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(1X2) 


87 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low q 


45 


(1X19X20) 


94 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(1X2X19X20) 


94 


43 


0.85 




B 674 


N08925 


Annealed 


Nf-Fe-Cr-Mo-Cu-Low C 


45 


(1) 


87 


43 


0.85 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(0(2) 


87 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(0(19X20) 


94 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(0(2X19X20) 


94 


43 


0.85 


(A08) 


B 675 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(8X22) 


95 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(2X8X22) 


95 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(8X21) 


100 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(2X8X21) 


100 


45 


0,85 


(AGS) 


B 676 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(8) (2 2) 


95 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(2X8X22) 


95 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(8) (21) 


100 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(2X8X21) 


100 


45 


0.85 



162 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASAAE B31.1b-2009 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 



(07) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 



-20 UNS 

to Alloy 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 No. 



Spec. 
No. 



Seamless Pipe and Tube (Cont'd) 



27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


27.1 


27.1 


25.7 


24.6 


23.8 


233 


23.1 


22.9 


22.8 


22.6 


28.6 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


28.6 


28.6 


27.0 


25.8 


25.0 


24.5 


24.3 


24.1 


24.0 


23.8 


22.9 


20.6 


19.7 


18.9 


18.2 


17.7 


17.5 


17.4 


17.2 


16.8 


22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


21.8 


19.4 


17.5 


16.7 


16.1 


15.5 


15.0 


14.9 


14.8 


14.6 


14.3 


19.4 


19.4 


19.2 


18,8 


18.8 


18.8 


18.7 


18.6 


18.5 


18.5 



19.4 17.5 16.7 16.1 15.5 15.0 14.9 14.8 14.6 14.3 
19.4 19.4 19.2 18.8 18.8 18.8 18.7 18.6 18.5 18.5 



19.8 


17,7 


16.3 


15.4 


14.6 


14.1 


13.9 


13.8 


13.6 


13.5 


19.8 


19.8 


19.8 


19.8 


19.8 


19.1 


18.8 


18.6 


18.4 


18.3 


24.3 


22.7 


20.9 


19.4 


18.3 


17.4 


17.0 


16.7 


16.4 


16.2 


24.3 


22,7 


20.9 


19.4 


18.3 


17.4 


17.0 


16.7 


16.4 


16.2 


23.2 


21.2 


19.6 


18.1 


16.9 


16.0 


15.5 


15.1 


14.8 


14.5 


23.2 


23.2 


23.2 


23.2 


22.9 


21.4 


20.9 


20.4 


20.0 


19.6 


24.3 


21.8 


19.6 


18.1 


17.1 


16.4 


16.1 


15.9 


15.7 


15.5 


24.3 


24.3 


23.8 


23.0 


22.5 


22.1 


21.7 


21.4 


21.1 


20.9 


24.3 


24.3 


23.9 


23.1 


22.6 


22.1 


21.9 


21.8 


21.6 


21.5 


24.3 


24.3 


23.9 


23.1 


22.6 


22.1 


21.9 


21.8 


21.6 


21.5 


23.2 


21.2 


19.6 


18.1 


16.9 


16.0 


15,5 


15.1 


14.8 


14.5 


23.2 


23.2 


23.2 


23.2 


22.9 


21.4 


20.9 


20.4 


20.0 


19.6 


24.3 


21.8 


19.6 


18.1 


17.1 


16.4 


16.1 


15.9 


15.7 


15.5 


24.3 


24.3 


23.8 


23.0 


22.5 


22.1 


21.7 


21.4 


21.1 


20.9 


21.1 


19.7 


18.1 


16.8 


15.6 


14.7 


14.4 


14.4 


14.4 


14.4 


21.1 


21.1 


20.4 


19.5 


18.8 


18.2 


17.9 


17.7 


17.4 


17.0 


22.9 


20.5 


18.3 


16.7 


15.9 


15.3 


15.0 


14.9 


14.8 




22.9 


22.9 


22.3 


21.1 


20.1 


19.4 


19.0 


18.7 


18.4 




21.1 


19,7 


18.1 


16.8 


15.6 


14.7 


14.4 


14.4 


14.4 


14.4 


21.1 


21.1 


20.4 


19.5 


18.8 


18.2 


17.9 


17.7 


17.4 


17.0 


22.9 


20.5 


18.3 


16.7 


15.9 


15.3 


15,0 


14.9 


14.8 




22.9 


22.9 


22.3 


21.1 


20.1 


19.4 


19.0 


18.7 


18.4 




23.1 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


153 


23.1 


23.1 


21.8 


20.9 


20.2 


19.8 


19,6 


19.5 


19.4 


19.2 


24.3 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


153 


24.3 


24.3 


23.0 


22.0 


21.3 


20.8 


20.7 


20.5 


20.4 


20.2 


23.1 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


153 


23.1 


23.1 


21.8 


20.9 


20.2 


19.8 


19.6 


19.5 


19.4 


19.2 


24.3 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


153 


24.3 


24.3 


23.0 


22.0 


21.3 


20.8 


20.7 


20.5 


20.4 


20.2 



4 13 
1 18 



4 14 
4 19 
3 15 
7 20 



4 14 

4 19 

3 15 

7 20, 



2 14, 

2 19 

2 15. 

5 20, 



2 14 

2 19, 

2 15 

5 20 



3 


13.2 


9 


17.8 


1 


14.0 





19.0 





14.8 


2 


20.0 


1 


14.0 





19.0 





14.8 


2 


20.0 



14 
19, 



5 14 
14, 



. N08367 


B 690 


(A08) 


. N08367 




(A08) 


. N08367 




(A08) 


. N08367 




(A08) 


. N08020 


B 729 




. N08020 






elded Pipe and Tube 




. N08020 


B 464 




. N08020 






. N08020 


B 468 




, N08020 






N06617 


B 546 




4 N06617 






. N06022 


B 619 




. N06022 






. N10276 






. N10276 






6 R30556 




(A09) 


6 R30556 




(A09) 


. N06022 


B 626 




. N06022 






. N10276 






. N10276 






6 R30556 




(A09) 


6 R30556 




(A09) 


. N08925 


B 673 




. N08925 






. N08926 






. N08926 






. N08925 


B 674 




. N08925 






. N08926 






. N08926 






, N08367 


B 675 


(A08) 


. N08367 




(A08) 


. N08367 




(A08) 


. N08367 




(A08) 


. N08367 


B 676 


(A08) 


. N08367 




(A08) 


. N08367 




(A08) 


. N08367 




(A08) 



163 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A»4 Nickel and High Nickel Alloys (Cont'd) 















Specified 


Specified 






UNS 










Minimum 


Minimum 


E 


Spec. 


Alloy 


Temper or 


Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


No. 


Condition 


Composition 


No. 


Notes 


ksi 


ksi 


F 



Welded Pipe and Tube (Cont'd) 





B 704 


N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(D(14) 


120 




B 705 


N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(D(14) 


120 


(A08) 


B 804 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(DCS) 


95 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-IVIo-Cu-N 


45 


(D(2)(8) 


95 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(DCS) (21) 


100 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(D (2X8) (2D 


100 




Plate, Sheet, and Strip 














B 168 


N06600 


Annealed 


Ni-Cr-Fe 


43 


(D 


80 






N06600 


Annealed 


Ni-Cr-Fe 


43 


(0(2) 


80 






N06600 


Hot rolled 


Ni-Cr-Fe 


43 


(0(4) 


85 






N06600 


Hot rolled 


Ni-Cr-Fe 


43 


(0(2)(4) 


85 




B 168 


N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


(0(7) 


95 






N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


(0(2)(7) 


95 




B 409 


N08800 


Annealed 


Ni-Cr-Fe 


45 


(4)(7) 


75 






N08800 


Annealed 


Ni-Cr-Fe 


45 


(2)(4)(7) 


75 






N08810 


Annealed 


Ni-Cr-Fe 


45 


(4) (7) 


65 






N08810 


Annealed 


Ni-Cr-Fe 


45 


(2) (4) (7) 


65 




B 424 


N08825 


Annealed 


Ni-Fe-Cr-Mo-Cu 


45 


(0(7) 


85 






N08825 


Annealed 


Ni-Fe-Cr-Mo-Cu 


45 


CO (2) (7) 


85 


(A09) 


B 435 


R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


CD 


100 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(0(2) 


100 




B 443 


N06625 


Sol. ann. 


Ni-Cr-Mo-Cb 


43 


(0(1 4) CIS) 


100 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


CO (u) 


110 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


CO CI 4) (15) 


120 




B 463 


N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(0 


80 






N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(0(12) 


80 




B 575 


N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(0(12) 


100 






N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(0(2)(12) 


100 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(0(12) 


100 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(0(2) (12) 


100 




B 625 


N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


CD 


87 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


CD (2) 


87 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(0(19)(20) 


94 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N~Low C 


45 


(O(2)(19)(20) 


94 


(A08) 


B 688 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(7) (ID (2 2) 


95 


(A08) 




N08367 


Sol. ann. 


Fe-Ni~Cr-Mo-Cu~N 


45 


(1)(2)(7)(10(22) 


95 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(7)(10)(2D 


100 


(A08) 




N08367 


Sot. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(0(2)(7)(10)(21) 


100 



60 


0.85 


60 


0.85 


45 


0.85 


45 


0.85 


45 


0.85 


45 


0.85 


35 


1.00 


35 


1.00 


35 


1.00 


35 


1.00 


35 


1.00 


35 


1.00 


30 


1.00 


30 


1.00 


25 


1.00 


25 


1.00 


35 


1.00 


35 


1.00 


45 


1.00 


45 


1.00 


40 


1.00 


55 


1.00 


60 


1.00 


35 


1.00 


35 


1.00 


45 


1.00 


45 


1.00 


41 


1.00 


41 


1.00 


43 


1.00 


43 


1.00 


43 


1.00 


43 


1.00 


45 


1.00 


45 


1.00 


45 


1.00 


45 


1.00 



164 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of AS'ME. 



ASME B31.1b-2009 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 



(07) 



Maximum Allowable Stress Values in Tension, ksl, for Metal Temperature, °F, Not Exceeding 

-20 UNS 

to Alloy Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 No. No. 



29.1 29.1 29.1 28.5 28.0 27.5 27.3 27.0 26.8 26.5 26.3 26.0 25.7 25.4 25.1 24.7 
29.1 29.1 29.1 28.5 28.0 27.5 27.3 27.0 26.8 26.5 26.3 26.0 25.7 25.4 25.1 24.7 



Welded Pipe and Tube (Cont'd) 
17.9 11.2 N06625 B 704 
17.9 11.2 N06625 B 705 



23.1 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


15.3 


















N08367 


B 804 


(A08) 


23.1 


23.1 


21.8 


20.9 


20.2 


19.8 


19.6 


19.5 


19.4 


19.2 


















N08367 




(A08) 


24.3 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


15,3 


















N08367 




(A08) 


24.3 


24.3 


23.0 


22.0 


21.3 


20.8 


20.7 


20.5 


20.4 


20.2 
















Plate 


N08367 
, Sheet, ar 


id Strip 


(A08) 


22.9 


21.3 


20.8 


20.5 


20.2 


19.9 


19.8 


19.6 


19.4 


19.1 


18.7 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2,0 


N06600 


B 168 




22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.9 


22.4 


16.0 


10.6 


7.0 


4.5 


3.0 


2.2 


2.0 


N06600 






23.3 


22.1 


21.5 


21.3 


21.3 


21.2 


21.1 


21.0 


20.8 


20.5 


20.1 


19.7 


19.3 


14.5 


10.3 


7.2 


5.8 


5.5 


N06600 






23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


233 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


14.5 


10.3 


7.2 


5.8 


5.5 


N06600 






23.3 


20.8 


19.2 


18.1 


17.2 


16.6 


16.4 


16.2 


16.0 


15.9 


15.8 


15.7 


15.6 


15.5 


15.4 


15.4 


15.3 


15.3 


N06617 


B 168 




23.3 


23.3 


23.3 


23.3 


23.3 


22.5 


22.1 


21.9 


21.7 


21.5 


21.3 


21.2 


21.0 


20.9 


20.9 


20.8 


20.7 


18.1 


N06617 






20.0 


18.5 


17.8 


17,2 


16.8 


16.3 


16.1 


15.9 


15.7 


15.5 


15.3 


15.1 


14.9 


14.7 


14.5 


13.0 


9.8 


6.6 


N08800 


B 409 




20,0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


17,0 


13.0 


9.8 


6.6 


N08800 






16.7 


15,4 


14.4 


13.6 


12.9 


12.2 


11.9 


11.6 


11.4 


11.1 


10.9 


10.7 


10.5 


10.4 


10.2 


10.0 


9.3 


7.4 


N08810 






16.7 


16.7 


16.7 


16.7 


16.7 


16.5 


1.6.1 


15.7 


15.3 


15.0 


14.7 


14.5 


14.2 


14.0 


13.8 


11.6 


9.3 


7.4 


N08810 






23.3 


21.4 


20.3 


19.4 


18.5 


17.8 


17.5 


17.3 


17.2 


17.0 


















N08825 


B 424 




23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.2 


23.0 


















N08825 






28.6 


25.6 


23.1 


21.3 


20.1 


19.3 


18.9 


18.7 


18.4 


18.2 


18.0 


17.8 


17.6 


17.5 


17.3 


17.1 


16.9 


13.6 


R30556 


B435 


(A09) 


28.6 


28.6 


28.0 


27.1 


26.4 


26.0 


25.6 


25.2 


24.9 


24.6 


24.3 


24.1 


23.8 


23.6 


23.3 


21.2 


17.0 


13.6 


R30556 




(A09) 


26.7 


24.9 


23.6 


22.6 


21.8 


21.1 


20.8 


20.6 


20.3 


20.1 


20.0 


19.8 


19.7 


19.5 


19.4 


19.4 


19.3 


19.3 


N06625 


B 443 




31.4 


31.4 


31.4 


30.8 


30.2 


29.7 


29.4 


29.1 


28.9 


28.6 


28.3 


28.0 


27.7 


27.4 


27.0 


26.6 


21.0 


13.2 


N06625 






34.3 


34.3 


34.3 


33.6 


32.9 


32.4 


32.1 


31.8 


31.5 


31.2 


30.9 


30.6 


30.3 


29.9 


29.5 


29.0 


21.0 


13.2 


N06625 






22.9 


20.6 


19.7 


18.9 


18.2 


17,7 


17.5 


17.4 


17.2 


16.8 


















N08020 


B 463 




22.9 


22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


















N08020 






28.6 


28.6 


28.2 


27.2 


26.5 


26.0 


25.8 


25.6 


25.4 


25.3 


















N06022 


B 575 




28.6 


28.6 


28.2 


27.2 


26.5 


26.0 


25.8 


25.6 


25.4 


25.3 


















N06022 






27.3 


24.9 


23.0 


21.3 


19.9 


18.8 


18.2 


17.8 


17.4 


17.1 


16.8 


16.7 


16.5 


16.5 










N10276 






27.3 


27.3 


27.3 


27.3 


26.9 


25.2 


24.6 


24.0 


23.5 


23.1 


22.8 


22.6 


22.4 


22.3 










N10276 






24.9 


23.2 


21.3 


19.8 


18.3 


17.3 


17.0 


16.9 


16.9 


16.9 


















N08925 


B 625 




24.9 


24.9 


23.9 


23.0 


22.1 


21.4 


21.1 


20.8 


20.4 


20.1 


















N08925 






26.9 


24.1 


21.5 


19.7 


18.7 


18.0 


17.7 


17.5 


17.4 




















N08926 






26.9 


26.9 


26.2 


24.8 


23.7 


22,8 


22.4 


22.0 


21.6 




















N08926 






27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 


B 688 


(A08) 


27.1 


27.1 


25.7 


24.6 


23.8 


23.3 


23.1 


22.9 


22.8 


22.6 


















N08367 




(A08) 


28.6 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 




(A08) 


28.6 


28.6 


27.0 


25.8 


25.0 


24.5 


24.3 


24.1 


24.0 


23.8 


















N08367 




(A08) 



165 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



(07) 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 





UNS 








ipec. 


Alloy 


Temper or 


Nominal 


P- 


No. 


No. 


Condition 


Composition 


No. 



Notes 



Specified 


Specified 




Minimum 


Minimum 


£ 


Tensile, 


Yield, 


or 


ksi 


ksi 


F 



Bars, Rods, Shapes, and Forgings 





B 166 


N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


CD (7) 


95 


35 


1.00 






N06617 


Annealed 


52Ni~22Cr-13Co-9Mo 


43 


(D(2)(7) 


95 


35 


1.00 




B 408 


N08800 


Annealed 


Ni-Cr-Fe 


45 


(7) 


75 


30 


1.00 






N08800 


Annealed 


Ni-Cr-Fe 


45 


(2) (7) 


75 


30 


1.00 






N08810 


Annealed 


Ni~~Cr~Fe 


45 


(7) 


65 


25 


1.00 






N08810 


Annealed 


Ni-Cr-Fe 


45 


(2) (7) 


65 


25 


1.00 




B 425 


N08825 


Annealed 


Ni-Fe-Cr-Mo-Cu 


45 


(1X7) 


85 


35 


1.00 






N08825 


Annealed 


Ni-Fe-Cr-Mo-Cu 


45 


(D(2)(7) 


85 


35 


1.00 




B 446 


N06625 


Sol. ann. 


Ni-Cr-Mo-Cb 


43 


(1)(14)(18) 


100 


40 


1.00 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(1)(2)(14)(16) 


110 


50 


1.00 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(1)(2)(14)(15)(17) 


120 


60 


1.00 




B 462 


N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


CD 


80 


35 


1.00 






N08020 


Annealed 


Ni-Fe-Cr-Mo-Cu-Cb 


45 


(D(2) 


80 


35 


1.00 




B 473 


N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


CD 


80 


35 


1.00 






N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


CD (2) 


80 


35 


1.00 




B 564 


N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


CDC7) 


95 


35 


1.00 






N06617 


Annealed 


52Ni-22Cr-13Co-9Mo 


43 


CDC2X7) 


95 


35 


1.00 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(0(2) (14) (16) 


110 


50 


1.00 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(1)(2)(14)(15)(17) 


120 


60 


1.00 


(A08) 


B 564 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(8)(22) 


95 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(2)(8)(22) 


95 


45 


1.00 






N08800 


Annealed 


Ni-Cr-Fe 


45 


CD 


75 


30 


1.00 






N08800 


Annealed 


Ni-Cr-Fe 


45 


CDC2) 


75 


30 


1.00 






N08810 


Annealed 


Nt~Cr-Fe 


45 


CD 


65 


25 


1.00 






N08810 


Annealed 


Ni-Cr-Fe 


45 


CDC2) 


65 


25 


1.00 


(A09) 


B 572 


R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


CD 


100 


45 


1.00 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


CD (2) 


100 


45 


1.00 




B 574 


N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(0(12) 


100 


45 


1.00 






N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(1)(2)(12) 


100 


45 


1.00 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(D(12) 


100 


41 


1.00 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(1)(2)(12) 


100 


41 


1.00 




B 649 


N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


CD 


87 


43 


1.00 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(DC2) 


87 


43 


1.00 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 




CD 


94 


43 


1.00 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 




CD (2) 


94 


43 


1.00 


(A08) 


B 691 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(8)(22) 


95 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(2)(8)(22) 


95 


45 


1.00 



166 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 



(07) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 UNS 

to Alloy Spec, 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 No. No. 



































Bars, Rods, Shapes, and Forgings 




23.3 


20.8 


19.2 


18.1 


17.2 


16.6 


16.4 


16.2 


16.0 


15.9 


15.8 


15.7 


15.6 


15.5 


15.4 


15.4 


15,3 


15.3 


N06617 


B 166 




23.3 


23.3 


23.3 


23.3 


23.3 


22.5 


22.1 


21.9 


21.7 


21.5 


21.3 


21.2 


21.0 


20.9 


20.9 


20.8 


20.7 


18.1 


N06617 






20.0 


18.5 


17.8 


17.2 


16.8 


16.3 


16.1 


15.9 


15.7 


15.5 


15.3 


15.1 


14.9 


14.7 


14.5 


13.0 


9.8 


6.6 


N08800 


B 408 




20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


17.0 


13.0 


9.8 


6.6 


N08800 






16.7 


15.4 


14.4 


13.6 


12.9 


12.2 


11.9 


11.6 


11.4 


11.1 


10.9 


10.7 


10.5 


10.4 


10.2 


10.0 


93 


7.4 


N08810 






16.7 


16.7 


16.7 


16.7 


16.7 


16.5 


16.1 


15.7 


15.3 


15.0 


14.7 


14.5 


14.2 


14.0 


13.8 


11.6 


93 


7.4 


N08810 






23.3 


21.4 


20.3 


19,4 


18.5 


17.8 


17.5 


17.3 


17.2 


17.0 


















N08825 


B 425 




23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.3 


23.2 


23.0 


















N08825 






26.7 


24.9 


23.6 


22.6 


21.8 


21.1 


20.8 


20.6 


20.3 


20.1 


20.0 


19.8 


19.7 


19.5 


19.4 


19.4 


19.3 


19.3 


N06625 


B 446 




31.4 


31.4 


31.4 


30.8 


30.2 


29.7 


29.4 


29.1 


28.9 


28.6 


28.3 


28.0 


27.7 


27.4 


27.0 


26.6 


21.0 


13.2 


N06625 






34.3 


34.3 


34.3 


33.6 


32.9 


32.4 


32.1 


31.8 


31.5 


31.2 


30.9 


30.6 


30.3 


29.9 


29.5 


29.0 


21.0 


13.2 


N06625 






22.9 


20.6 


19.7 


18.9 


18.2 


17.7 


17.5 


17.4 


17.2 


16.8 


















N08020 


B 462 




22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


21.8 


















N08020 






22.9 


20,6 


19.7 


18.9 


18.2 


17.7 


17.5 


17.4 


17.2 


16.8 


















N08020 


B473 




22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


21.8 


















N08020 






23.3 


20.8 


19.2 


18.1 


17.2 


16.6 


16.4 


16.2 


16.0 


15.9 


15.8 


15.7 


15.6 


15.5 


15.4 


15.4 


15.3 


15.3 


N06617 


B 564 




23.3 


23.3 


23.3 


23.3 


23.3 


22.5 


22.1 


21.9 


21.7 


21.5 


21.3 


21.2 


21.0 


20.9 


20.9 


20,8 


20.7 


18.1 


N06617 






31.4 


31.4 


31.4 


30.8 


30.2 


29.7 


29.4 


29.1 


28.9 


28.6 


28.3 


28.0 


27.7 


27.4 


27.0 


26.6 


21.0 


13.2 


N06625 






34.3 


34.3 


34.3 


33.6 


32.9 


32.4 


32.1 


31.8 


31.5 


31.2 


30.9 


30.6 


30.3 


29.9 


29.5 


29.0 


21.0 


13.2 


N06625 






27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 


B 564 


(A08) 


27.1 


27.1 


25.7 


24.6 


23.8 


233 


23.1 


22.9 


22.8 


22.6 


















N08367 




(A08) 


20.0 


18.5 


17.8 


17.2 


16.8 


16.3 


16.1 


15.9 


15.7 


15.5 


15.3 


15.1 


14.9 


14.7 


14.5 


13.0 


9.8 


6.6 


N08800 






20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


20.0 


19.9 


17.0 


13.0 


9.8 


6.6 


N08800 






16.7 


15.4 


14.4 


13.6 


12.9 


12.2 


11.9 


11.6 


11.4 


11.1 


10.9 


10.7 


10,5 


10.4 


10.2 


10.0 


9.3 


7.4 


N08810 






16.7 


16.7 


16.7 


16.7 


16.7 


16.5 


16.1 


15.7 


15.3 


15.0 


14.7 


14.5 


14.2 


14.0 


13.8 


11.6 


9.3 


7.4 


N08810 






28.6 


25.6 


23.1 


21.3 


20.1 


19.3 


18.9 


18.7 


18.4 


18.2 


18.0 


17.8 


17.6 


17.5 


17.3 


17.1 


16.9 


13.6 


R30556 


B 572 


(A09) 


28.6 


28.6 


28.0 


27.1 


26.4 


26.0 


25.6 


25.2 


24.9 


24.6 


24.3 


24.1 


23.8 


23.6 


23.3 


21.2 


17.0 


13.6 


R30556 




(A09) 


28.6 


22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


















N06022 


B 574 




28.6 


28.6 


28.2 


27.2 


26.5 


26.0 


25.8 


25.6 


25.4 


25.3 


















N06022 






27.3 


24.9 


23.0 


21.3 


19.9 


18.8 


18.2 


17.8 


17.4 


17.1 


16.9 


16.7 


16.6 


16.5 










N10276 






27.3 


27.3 


27.3 


27.3 


26.9 


25.2 


24.6 


24.0 


23.5 


23.1 


22.8 


22.6 


22.4 


22.3 










N10276 






24.9 


23.2 


21.3 


19.8 


18.3 


17.3 


17.0 


16.9 


16.9 


16.9 


















N08925 


B 649 




24.9 


24.9 


23.9 


23.0 


22.1 


21.4 


21.1 


20.8 


20.4 


20.1 


















N08925 






26.9 


24.1 


21.5 


19.7 


18.7 


18.0 


17.7 


17.5 


17.4 




















N08926 






26.9 


26.9 


26.2 


24.8 


23.7 


22.8 


22.4 


22.0 


21.6 




















N08926 






27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 


B 691 


(A08) 


27.1 


27.1 


25.7 


24.6 


23.8 


23.3 


23.1 


22.9 


22.8 


22.6 


















N08367 




(A08) 



167 



Copyright © 2009 by trie American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASA/IE B31.1D-2009 



(07) 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 

















Specified 


Specified 








UNS 










Minimum 


Minimum 


E 




Spec. 


Alloy 


Temper or 


Nominal 


P- 




Tensile, 


Yield, 


or 




No. 


No. 


Condition 


Composition 


No. 


Notes 


ksi 


ksi 


F 




Seamless Fittings 


















B 366 


N06022 


Sol ann. 


Nf-Mo-Cr-Low C 


44 


(D(12) 


100 


45 


1.00 






N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(D(2)(12) 


100 


45 


1.00 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(D(14) 


110 


50 


1.00 




B 366 


N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


(1) 


80 


35 








N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


(1)(2) 


80 


35 








N08367 


Annealed 


Ni-Fe-Cr-Mo 


45 


(DCS) 


95 


45 


1.00 






N08367 


Annealed 


Ni-Fe-Cr-Mo 


45 


(1)(2)(8) 


95 


45 


1.00 




B 366 


N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(1) 


94 


43 


1.00 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(1)(2) 


94 


43 


1.00 






N10276 


Sol ann. 


Low C-Ni-Mo-Cr 


43 


(D(12) 


100 


41 


1.00 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(D(2)(12) 


100 


41 


1.00 


(A09) 


B 366 


R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(1) 


100 


45 


1.00 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-fVto-W 


45 


(1X2) 


100 


45 


1.00 


(A08) 


B 462 


N08367 


Sol. ann. 


Fe-Ni-Cr-Mo~Cu-N 


45 


(1X8X22) 


95 


45 


1.00 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(2)(8)(22) 


95 


45 


1.00 




Welded Fittings 


















B 366 


N06022 


Sol. ann. 


Ni-Mo-Cr-Low C 


44 


(D(12) 


100 


45 


0.85 






N06022 


Sol. ann. 


Ni~Mo-Cr-Low C 


44 


(0(2X12) 


100 


45 


0.85 






N06625 


Annealed 


Ni-Cr-Mo-Cb 


43 


(1X14) 


110 


50 


0.85 






N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


(1) 


80 


35 


0.85 






N08020 


Annealed 


Cr-Ni-Fe-Mo-Cu-Cb 


45 


(D(2) 


80 


35 


0.85 


(A08) 


B 366 


N08367 


Sol ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1X8X22) 


95 


45 


0.85 


(A08) 




N08367 


Sol. ann. 


Fe-Ni-Cr-Mo-Cu-N 


45 


(1)(2)(8)(22) 


95 


45 


0.85 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(1) 


87 


43 


0.85 






N08925 


Annealed 


Ni-Fe-Cr-Mo-Cu-Low C 


45 


(1X2) 


87 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(1X19X20) 


94 


43 


0.85 






N08926 


Annealed 


Ni-Fe-Cr-Mo-Cu-N-Low C 


45 


(1)(2)(19)(20) 


94 


43 


0.85 




B 366 


N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(1X12) 


100 


41 


0.85 






N10276 


Sol. ann. 


Low C-Ni-Mo-Cr 


43 


(1)(2)(12) 


100 


41 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(1)02) 


100 


45 


0.85 


(A09) 




R30556 


Annealed 


Ni-Fe-Cr-Co-Mo-W 


45 


(0(2X12) 


100 


45 


0.85 



168 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME R31.1b-2009 



Table A-4 MIckel and High Nickel Alloys (Cont'd) 



(07) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 

-20 UNS 

to Alloy Spec. 

100 200 300 400 500 600 650 700 750 800 850 900 950 1,000 1,050 1,100 1,150 1,200 No. No. 







































Seamless Fittings 




28.6 


22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


















N06022 


B 366 




28.6 


28.6 


28.2 


27.2 


26.5 


26.0 


25.8 


25.6 


25.4 


25.3 


















N06022 






26.7 


26.7 


26.5 


25.8 


25.0 


24.3 


24.1 


23.7 


23.5 


23.3 


23.0 


22.9 


22.8 


22.6 


22.5 


22.4 


17.9 


11.2 


N06625 






22.9 


20.6 


19.7 


18.9 


18.2 


17.7 


17.5 


17.4 


17.2 


16.8 


















N08020 


B366 




22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


21.8 


















N08020 






27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 






27.1 


27.1 


25.7 


24.6 


23.8 


23.3 


23.1 


22.9 


22.8 


22.6 


















N08367 






26.9 


24.1 


21.5 


19.7 


18.7 


18.0 


17.7 


17.5 


17.4 




















N08926 


B 366 




26.9 


26.9 


26.2 


24.8 


23.7 


22.8 


22.4 


22.0 


21.6 




















N08926 






273 


24.9 


23.0 


21.3 


19.9 


18.8 


18.2 


17.8 


17.4 


17.1 


16.9 


16.7 


16.6 


16.5 










N10276 






27.3 


27.3 


27.3 


27.3 


26.9 


25.2 


24.6 


24.0 


23.5 


23.1 


22.8 


22.6 


22.4 


22.3 










N10276 






28.6 


25.6 


23.1 


21.3 


20.1 


19.3 


18.9 


18.7 


18.4 


18.2 


18.0 


17.8 


17.6 


17.5 


17.3 


17.1 


16.9 


13.6 


R30556 


B 366 


(A09) 


28.6 


28.6 


28.0 


27.1 


26.4 


26.0 


25.6 


25.2 


24.9 


24.6 


24.3 


24.1 


23.8 


23.6 


23.3 


21.2 


17.0 


13.6 


R30556 




(A09) 


27.1 


26.2 


23.8 


21.9 


20.5 


19.4 


19.0 


18.6 


18.3 


18.0 


















N08367 


B 462 


(A08) 


27.1 


27.1 


25.7 


24.6 


23.8 


23.3 


23.1 


22.9 


22.8 


22.6 


















N08367 




(A08) 






































Welded Fittings 




24.3 


22.7 


20.9 


19.4 


18.3 


17.4 


17.0 


16.7 


16.4 


16.2 


















N06022 


B 366 




24.3 


24.3 


23.9 


23.1 


22.6 


22.1 


21.9 


21.8 


21.6 


21.5 


















N06022 






31.4 


31.4 


31.2 


30.3 


29.4 


28.6 


28.3 


27.9 


27.6 


27.4 


27.1 


26.9 


26.8 


26.6 


26.5 


26.4 


21.0 


13.2 


N06625 






22.9 


20.6 


19.7 


18.9 


18.2 


17.7 


17.5 


17.4 


17.2 


16.8 


















N08020 






22.9 


22.9 


22.6 


22.2 


22.1 


22.1 


22.0 


21.9 


21.8 


21.8 


















N08020 






23.1 


22.2 


20.2 


18.7 


17.4 


16.5 


16.1 


15.8 


15.5 


15.3 


















N08367 


B 366 


(A08) 


23.1 


23.1 


21.8 


20.9 


20.2 


19.8 


19.6 


19.5 


19.4 


19.2 


















N08367 




(A08) 


21.1 


19.7 


18.1 


16.8 


15.6 


14.7 


14.4 


14.4 


14.4 


14.4 


















N08925 






21.1 


21.1 


20.4 


19.5 


18.8 


18.2 


17.9 


17.7 


17.4 


17.0 


















N08925 






22.9 


20.5 


18.3 


16.7 


15.9 


15.3 


15.0 


14.9 


14.8 




















N08926 






22.9 


22.9 


22.3 


21.1 


20.1 


19.4 


19.0 


18.7 


18.4 




















N08926 






23.2 


21.2 


19.6 


18.1 


16.9 


16.0 


15.5 


15.1 


14.8 


14.5 


14.4 


14.2 


14.1 


14.0 










N10276 


B 366 




23.2 


23.2 


23.2 


23.2 


22.9 


21.4 


20.9 


20.4 


20.0 


19.6 


19.4 


19.2 


19.0 


19.0 










N10276 






24.3 


21.8 


19.6 


18.1 


17.1 


16.4 


16.1 


15.9 


15.7 


15.5 


15.3 


15.2 


15.0 


14.8 


14.7 


14.5 


14.4 


11.6 


R30556 




(A09) 


24.3 


24.3 


23.8 


23.0 


22.5 


22.1 


21.7 


21.4 


21.1 


20.9 


20.7 


20.5 


20.2 


20.0 


19.8 


18.0 


14.4 


11.6 


R30556 




(A09) 



169 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-4 Nickel and High Nickel Alloys (Cont'd) 

GENERAL NOTES: 

(a) The tabulated specifications are ANSI/ASTM or ASTA/L For ASME Boiler and Pressure Vessel Code applications, see related 
specifications in Section II of the ASME Code. 

(b) The stress values in this Table may be interpolated to determine values for intermediate temperatures. 

(c) The P-Numbers indicated in this Table are identical to those adopted by the ASME Boiler and Pressure Vessel Code. Qualification of 
welding procedures, welders, and welding operators is required and shall comply with the ASME Boiler and Pressure Vessel Code, 
Section IX, except as modified by para. 127.5. 

(d) Tensile strengths and allowable stresses shown in "ksi" are "thousands of pounds per square inch." 

(e) The materials listed in this table shall not be used at design temperatures above those for which allowable stress values are given 
herein or in Table A-8. 

(0 The tabulated stress values are S x E (weld joint efficiency factor) or S x F (material quality factor), as applicable. Weld joint 

efficiency factors are shown in Table 102.43. 
(g) Pressure-temperature ratings of piping components, as published in standards referenced in this Code, may be used for components 

meeting the requirements of those standards. The allowable stress values given in this Table are for use in designing piping 

components which are not manufactured in accordance with referenced standards, 
(h) The y coefficient = 0.4 except where Note (7) applies [see Table 104.1.2(A)], 
(i) The tabulated stress values that are shown in italics are at temperatures in the range where creep and stress rupture strength govern 

the selection of stresses. 
NOTES: 

(1) THIS MATERIAL IS NOT ACCEPTABLE FOR USE ON BOILER EXTERNAL PIPING - SEE FIGS. 100.1.2(A) AND (B). 

(2) Due to the relatively low yield strengths of these materials, these higher allowable stress values were established at temperatures 
where the short time tensile properties govern to permit the use of these alloys where slightly greater deformation is acceptable. 
These stress values exceed 67% but do not exceed 90% of the yield strength at temperature. Use of these values may result In 
dimensional changes due to permanent strain. These values should not be used for flanges of gasketed joints or other applications 
where slight amounts of distortion can cause leakage or malfunction. 

(3) The maximum temperature is limited to 500°F because harder temper adversely affects design stress in the creep rupture 
temperature range. 

(4) These values may be used for plate material only. 

(5) These values apply to sizes NPS 5 and smaller. 

(6) These values apply to sizes larger than NPS 5. 

(7) See Table 104.1.2(A) for y coefficient value. 

(8) Heat treatment after forming or welding is neither required nor prohibited. However, if heat treatment is applied, the solution 
annealing treatment shall consist of heating to a minimum temperature of 2,025°F and then quenching in water or rapidly cooling by 
other means. 

(9) These values apply to thickness less than J / 16 in. 

(10) These values apply to thickness from 3 / 16 in. up to and including % in. 

(11) These values apply to thickness more than 3 / 4 in. 

(12) All filler metal, including consumable insert material, shall comply with the requirements of Section IX of the ASME Boiler and 
Pressure Vessel Code. 

(13) DELETED 

(14) This alloy is subject to severe loss of impact strength at room temperature after exposure in the range of 1,000°F to 1,400°F. 

(15) The minimum tensile strength of reduced tension specimens in accordance with QW-462.1 of Section IX shall not be less than 
110,000 psi. 

(16) These values apply to material with a thickness of greater than 4 in. prior to machining or fabricating. 

(17) These values apply to material with a maximum thickness of 4 in, prior to machining or fabricating. 

(18) For service at 1,200°F or higher, the deposited weld metal shall be of the same nominal chemistry as the base metal. 

(19) Heat treatment after fabrication and forming is neither required nor prohibited. If heat treatment is performed, the material shall be 
heated for a sufficient time in the range of 2,010°F to 2,100°F followed by quenching in water or rapidly cooled by another means. 

(20) Welding electrodes or filter metal used for welding UNS N08926 shall conform to SFA-5.11 ENiCrMo-3 or ENiCrMo-4, or SFA-5.14 
ERNiCrMo-3 or ERNiCrMo-4. 

(A08) (21) These values apply to thicknesses 3 / 16 in. or less. 
(A08) (22) These values apply to thicknesses greater than 3 / 16 in. 



170 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A- 7 Aluminum and Aluminum Alloys (Cont'd) 



Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 



-20 
to 
100 



150 



200 



250 



300 



350 



400 



UNS Alloy No. 



Spec. 

No. 



4.9 
4.6 
63 
6.0 
8.6 
4.9 



4.9 
4.6 
63 
6.0 
8.6 
4.9 



4.9 
4.6 
63 
6.0 
8.6 
4.9 



4.2 
4.0 
5.1 
4.9 
6.8 
4.2 



4.2 
4.0 
4.6 
43 
5.0 
3.9 



3.4 
3.4 
3.4 
3.4 
3.4 
3.0 



Rods, Bars, and Shapes (Cont'd) 

2.0 A96063 B 221 

2.0 A96063 

2.0 A96063 

2.0 A96063 

2.0 A96063 

2.0 A96063 



3.2 
6.9 
5.8 



3.2 
6.9 

5.8 



3.2 
6.9 
5.8 



3.0 
5.0 
5.0 



2.8 



4.3 



2.5 



33 



2.2 



1.9 



A24430 
A03560 
A03560 



Castings 

B 26 



(8) 
(9) 

(10) 

(11) 



NOTES (Cont'd): 
(7) The strength of a reduced-section tensile specimen is required to qualify welding procedures. Refer to the ASME Boiler and Pressure 
Vessel Code, Section iX, QW-150. 

Refer to the ASME Boiler and Pressure Vessel Code, Section VII!, Part UNF, NF-13(b) regarding stress corrosion. 
For stress relieved tempers (T351, T3510, T3511, T451, T4510, T4511, T651, T6510, and T6511), stress values for the material in 
the basic temper shall be used. 

These allowable stress values apply to all thicknesses and sizes of seamless pipe. They also apply to seamless extruded tube in 
thicknesses up to and including 1.000 in. 
These allowable stress values are for die forgings. 

(12) These allowable stress values are for hand forgings. 

(13) For temperatures up to 300°F, these allowable stress values are 83% of those for the corresponding core material. At temperatures of 
350°F and 400°F, these allowable stress values are 90% of those for the corresponding core material. 

(14) These allowable stress values are for the tempers listed in the welded condition and are identical to those for the temper. 

(15) These allowable stress values are based on 100% radiography of the longitudinal weld in accordance with ASTM B 547, para. 11. 

(16) These allowable stress values are based on spot radiography of the longitudinal weld in accordance with ASTM B 547, para. 11. 

(17) These allowable stress values are for the heat treated tempers listed in the welded condition. 

(18) The tension test specimen from plate which is not less than 0.500 in. thick is machined from the core and does not include the clad- 
ding alloy. Therefore, the allowable stress values for thicknesses less than 0.500 in. shall be used. 

(19) The tension test specimen from plate which is not less than 0,500 in. thick is machined from the core and does not include the clad- 
ding alloy. Therefore, these allowable stress values are 90% of those for the core material of the same thickness. 

(20) The allowable stress values for seamless pipe in sizes NPS 1 and larger are as follows: 



100°F 


3.5 ksi 


150°F 


3.5 ksi 


200°F 


3.4 ksi 



(21) Stress values in restricted shear, such as in dowel bolts or similar construction in which the shearing member is so restricted that 
the section under consideration would fail without reduction of area, shall be 0.80 times the values in this Table. 

(22) Stress values in bearing shall be 1.60 times the values in this Table. 

(23) ASTM B 210 does not include this alloy/grade of material. 



185 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-8 Temperatures 1,200°F and Above 

















Specified 


Specified 






UNS 










Minimum 


Minimum 


Spec. 


Type or 


Alloy 






P- 




Tensile, 


Yield, 


No. 


Grade 


No. 


Temper 


Nominal Composition 


No. 


Notes 


kst 


ksi 


Seamless Pipe and Tube 
















A 213 


TP304H 


S30409 




18Cr-8Ni 


8 




75 


30 






S30815 




21Cr-llNi-N 


8 


W 


87 


45 




TP310H 


S31009 




25Cr-20Ni 


8 


(2) (4) 


75 


30 




TP316H 


S31609 




16Cr-12Ni-2Mo 


8 




75 


30 




TP316L 


S31603 




16Cr-12Ni-2Mo 


8 


(1) 


70 


25 


A 213 


TP321H 


S32109 




18Cr-10Ni-Ti 


8 




75 


30 




TP347H 


$34709 




18O-10Ni-Cb 


8 




75 


30 




TP348H 


S34809 




18Cr-10Ni-Cb 


8 




75 


30 


A 312 


TP304H 


530409 




18Cr-8Ni 


8 




75 


30 






S30815 




21Cr-llNi-N 


8 


(1) 


87 


45 




TP310H 


S31009 




25Cr-20Ni 


8 


(2) (4) 


75 


30 




TP316H 


S31609 




16Cr-12Ni-2Mo 


8 




75 


30 


A 312 


TP321H 


S32109 




18Cr-10Ni-Ti 


8 




75 


30 




TP347H 


534709 




18Cr-10Ni-Cb 


8 




75 


30 




TP348H 


S34809 




18Cr-10Ni-Cb 


8 




75 


30 


A 376 


TP304H 


S30409 




18Cr-8Ni 


8 




75 


30 




TP316H 


531609 




16Cr-12Ni-2Mo 


8 




75 


30 




TP321H 


532109 




18Cr-10Ni-Ti 


8 




75 


30 




TP347H 


S34709 




18Cr-10Ni-Cb 


8 




75 


30 


A 430 


FP304H 


S30409 




18Cr~8NI 


8 




70 


30 




FP316H 


S31609 




16Cr-12Ni-2Mo 


8 




70 


30 




FP321H 


532109 




18Cr-10Ni-Ti 


8 




70 


30 




FP347H 


S34709 




18Cr~10Ni-Cb 


8 




70 


30 


B 163 




N08800 


Annealed 


Ni~Cr-Fe 


45 


(1) 


75 


30 






N08810 


Annealed 


Ni-Cr-Fe 


45 


(1) 


65 


25 





B 167 






B 407 




(A09) 


B 622 






Welded Pipe 


and Tube 




A 249 


TP304H 



N06617 Annealed 

N08800 C.D./ann. 
N08810 Annealed 

R30556 Annealed 

- Without Filler Metal 



A 249 



A 312 



TP304H 


S30409 




530815 


TP310H 


S31009 


TP316H 


531609 


TP321H 


S32109 


TP347H 


534709 


TP348H 


534809 


TP304H 


S30409 




S30815 


TP310H 


531009 


TP316H 


531609 



52Ni-22Cr-13Co~9MG 

Ni-Cr-Fe 
Ni-Cr-Fe 

Ni-Fe-Cr-Co-Mo-W 



18Cr-8Ni 

21Cr-llNi-N 

25Cr-20Ni 

16Cr-12Ni-2Mo 

ISCr-lONi-Ti 

ISCr-lONi-Cb 
18Cr~10Ni-Cb 



43 

45 
45 

45 



(1) 



-N 



18Cr-8Ni 
21Cr-llNi- 
25Cr-20Ni 
16Cr~12Ni-2Mo 



95 

75 
65 

100 



35 

30 
25 

45 





75 


35 


(1) 


87 


45 


(D(2)(4) 


75 


35 




75 


35 




75 


35 




75 


35 




75 


35 




75 


30 


(1) 


87 


45 


(2) (4) 


75 


30 




75 


30 



186 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-8 Temperatures 1 9 200°F and Above 



for 

f 



A/iaximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding 



1,200 



1,250 



1,300 



1,350 



1,400 



1,450 



1,500 



Type or 
Grade 



Spec. 
No. 



1.00 


6 A 


4.7 


3.7 


2.9 


2.3 


1.8 


1.4 


TP304H 


1.00 


5.2 


4.0 


3 A 


2.4 


1.9 


1.6 


13 




1.00 


4.0 


3.0 


2.2 


1.7 


13 


0.97 


0.75 


TP310H 


1.00 


7A 


5.5 


4 A 


3.1 


2.3 


1.7 


13 


TP316H 


1.00 


6.4 


4.7 


3.5 


2.5 


1.8 


13 


1.0 


TP316L 


1.00 


5.4 


4 A 


3.2 


2.5 


1.9 


1.5 


1.1 


TP321H 


1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


TP347H 


1.00 


7.9 


5.9 


4.4 


3.2 


2,5 


1.8 


13 


TP348H 


1.00 


6.1 


4.7 


3.7 


2.9 


2.3 


1.8 


1.4 


TP304H 


1.00 


5.2 


4.0 


3 A 


2.4 


1.9 


1.6 


1.3 




1.00 


4.0 


3.0 


2.2 


1.7 


1.3 


0.97 


0.75 


TP310H 


1.00 


7.4 


5.5 


4 A 


3 A 


2.3 


1.7 


13 


TP316H 


1.00 


5.4 


4.1 


3.2 


2.5 


1.9 


1.5 


1A 


TP321H 


1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


1.3 


TP347H 


1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


TP348H 


1.00 


6.1 


4.7 


3.7 


2.9 


23 


1.8 


1.4 


TP304H 


1.00 


7.4 


5.5 


4 A 


3 A 


23 


1.7 


13 


TP316H 


1.00 


5.4 


4 A 


3.2 


2.5 


1.9 


1.5 


1.1 


TP321H 


1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


1.3 


TP347H 


1.00 


6 A 


4.7 


3.7 


2.9 


2.3 


1.8 


1.4 


FP304H 


1.00 


7.4 


5.5 


4 A 


3.1 


23 


1.7 


13 


FP316H 


1.00 


5.4 


4.1 


3.2 


2.5 


1.9 


1.5 


1A 


FP321H 


1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


FP347H 


1.00 


6.6 


4.2 


2.0 


1.6 


1.1 


1.0 


0.80 




1.00 


7.4 


5.9 


4.7 


3.8 


3.0 


2.4 


1.9 





1.00 



1.00 



15.3 



13.6 



14.5 



11.2 



6.6 



10.9 



8.8 



7.0 



5.6 



5.1 



4.5 



3.9 



1.00 


6.6 


4.2 


2.0 


1.6 


1.1 


1.0 


0.80 


1.00 


7.4 


5.9 


4.7 


3.8 


3.0 


2.4 


1.9 



3.6 



Seamless Pipe and Tube 

A 213 



R30556 



A 213 



A 312 



A 312 



A 376 



A 430 



8 163 



B 167 



B 407 



B 622 (A09) 



Welded Pipe and Tube — Without Filler Metal 

A 249 



A 249 



0.85 


5.2 


4.0 


3.2 


2.5 


2.0 


1.6 


1.2 


TP304H 


0.85 


4.4 


3.4 


2.6 


2.0 


1.6 


1.4 


1A 




0.85 


3.4 


2.6 


1.9 


1.4 


1.1 


0.82 


0.64 


TP310H 


0.85 


63 


4.7 


3.5 


2.6 


1.9 


1.5 


1A 


TP316H 


0.85 


4.6 


3.5 


2.7 


2 A 


1.6 


13 


1.0 


TP321H 


0.85 


6.7 


5.0 


3.7 


2.7 


2.1 


1.6 


1A 


TP347H 


0.85 


6.7 


5.0 


3.7 


2.7 


2 A 


1.6 


1.1 


TP348H 


0.85 


5.2 


4.0 


3.2 


2.5 


2.0 


1.6 


1.2 


TP304H 


0.85 


4.4 


3.4 


2.6 


2.0 


1.6 


1.4 


1.1 




0.85 


3.4 


2.6 


1.9 


1.4 


1.1 


0.82 


0.64 


TP310H 


0.85 


6.3 


4.7 


3.5 


2.6 


1.9 


1.5 


1.1 


TP316H 



A 312 



187 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-8 Temperatures 1,200°F and Above (Cont'd) 



Spec. 
No. 



Type or 
Grade 



UNS 
Alloy 
No. 



Temper 



Nominal Composition 



P- 
No. 



Notes 



Specified 


Specified 


Minimum 


Minimum 


Tensile, 


Yield, 


ksi 


ksi 



Welded Pipe and Tube - Without Filler Metal (Cont'd) 





A 312 


TP321H 


S32109 




18Cr- 


lONi- 


-Ti 








TP347H 


S32709 




18Cr- 


lONi- 


-Cb 






A 409 




S30815 




21Cr- 


UNi- 


-N 




(A09) 


B 619 




R30556 


Annealed 


Ni-Fe 


-Cr-Co-Mo- 


-W 


(A09) 


B 626 




R30556 


Annealed 


Ni-Fe 


-Cr-Co-Mo- 


-w 




Welded Pipe and Tube — 


Filler Metal Added 












A 358 


1 & 3 


S30815 




21Cr- 


UNi 


-N 








2 


S30815 




21Cr- 


UNi- 


-N 






A 409 




S30815 




21Cr- 


UNi 


-N 






B 546 




N06617 


Annealed 


52Ni- 


-22Cr 


-13Co- 


-9Mo 




Plate 


















A 240 


304 
310S 


S30400 
S30815 
S31008 




18Cr- 

21Cr- 
25Cr- 


8Ni 

-UNi 

20Ni 


~N 








316 


S31600 




16Cr- 


12Ni 


~2Mo 








316L 


S31603 




16Cr- 


12Ni 


-2Mo 






A 240 


321 


S32100 




18Cr- 


-lONi 


-Ti 








347 


S34700 




18Cr» 


lONi 


-Cb 








348 


S34800 




18Cr- 


-lONi 


-Cb 






B 168 




N06617 


Annealed 


52Ni- 


-22Cr 


-13Co~ 


~9Mo 




B 409 




N08800 
N08810 


Annealed 

Annealed 


Ni-Cr 

Ni-Cr 


-Fe 
-Fe 






(A09) 


Plate, Sheet, and Strip 
















B 435 




R30556 


Annealed 


Ni-Fe 


-Cr-Co-Mo- 


~W 




Bars, Rods, 


and Shapes 
















A 479 




S30815 




21Cr- 


-UNi 


~N 








TP316L 


S31603 




16Cr- 


-12Ni 


-2Mo 






B 166 




N06617 


Annealed 


52Ni- 


-22Cr 


-13Co- 


-9Mo 




B 408 




N08800 
N08810 


Annealed 
Annealed 


Ni-Cf 

Ni-Cr 


-Fe 
-Fe 






(A09) 


B 572 
Forgings 




R30556 


Annealed 


Ni-Fe 


-Cr- 


:o-Mo 


-W 




A 182 


F304H 
F310H 


S30409 
S30815 
S31009 




18Cr- 
2lCr- 
25Cr- 


-8Ni 

-UNi 

-20Ni 


-N 








F316H 


531609 




16Cr- 


-12Ni 


-2Mo 








F316L 


S31603 




16Cr- 


-12Ni 


-2Mo 





45 
45 



43 



43 

45 

45 



45 



43 

45 

45 

45 



(1) 

(1) 
(1) 



(1) 
(1) 

(1) 



(2) (3) 

(1) 

(2) (3) (4) 

(2X3) 

(1) 

(2)(3) 
0)0) 
(D(2)(3) 



(3) 
(3) 



(1) 



(1) 
(0(5) 



(1) 



75 
75 

87 

100 
100 



87 
87 

87 

95 



75 
87 
75 
75 
70 

75 
75 
75 

95 

75 
65 



100 



87 

70 

95 

75 
65 

100 



30 
30 

45 

45 

45 



45 
45 



45 
35 



30 
45 
30 
30 
25 

30 
30 
30 

35 

30 
25 



45 



45 
25 

36 

30 
25 

45 





75 


30 


(1) 


87 


45 


(D(2)(4) 


75 


30 




75 


30 


(1) 


70 


25 



188 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-8 Temperatures 1,200°F and Above (Cont'd) 



c or Maximum Allowable Stress Values in Tension, ksi, for Metal Temperature, °F, Not Exceeding j c DGC 

F 1,200 1,250 1,300 1,350 1,400 1,450 1,500 Grade No. 



Welded Pipe and Tube - Without Filler Metal (Cont'd) 

A 312 



0.85 


4.6 


33 


2.7 


2.1 


1.6 


1.3 


to 


TP321H 


0.85 


6.7 


5.0 


3.7 


2.7 


2 A 


1.6 


1A 


TP347H 



0.85 4.4 3.4 2.6 2.0 1.6 1A 1A ... A 409 

0.85 11.6 9.3 7.5 6.0 4.8 3.8 3.1 R30556 B 619 (A09) 

0.85 11.6 9.3 7.5 6.0 4.8 3.8 3.1 R30556 B 626 (A09) 

Welded Pipe and Tube — Filler Metal Added 

1.00 5.2 4.0 3A 2.4 1.9 1.6 1.3 1 & 3 A 358 

0.90 4.7 3.6 2.8 2.2 1.7 1.4 1.2 2 

0.80 4.2 3.2 2.5 1.9 1.5 1.3 1.0 ... A 409 

0.85 13.0 123 9.5 7.4 5.6 4.3 3.3 ... B 546 



1.00 6.1 4.7 3.7 2.9 2.3 1.8 1.4 

1.00 5.2 4.0 3A 2.4 1.9 1.6 13 

1.00 2.5 1.5 0.80 0.50 0.40 030 0,20 

1.00 7.4 5.5 4A 3A 23 1.7 13 

1.00 6.4 4.7 3.5 2.5 1.8 13 1.0 

1.00 3.6 2.6 1,7 1.1 0.80 0.50 030 

1.00 4.4 33 2.2 13 1.2 0.90 0.80 

1.00 4.4 33 2.2 13 1.2 0.90 0.80 

1.00 15.3 143 11.2 8.7 6.6 5A 3.9 



1.00 


6.6 


4.2 


2.0 


1.6 


1A 


1.0 


0.80 


1.00 


7.4 


5.9 


4.7 


3.8 


3.0 


2.4 


IS 





Plate 


304 


A 240 


310S 




316 




316L 




321 


A 240 


347 




348 






B 168 




B 409 



Plate, Sheet, and Strip (A09) 
1.00 13.6 10.9 8.8 7.0 5.6 4.5 3.6 R30556 B 435 



















Bars, Rods, 


and Shapes 


1.00 


5.2 


4.0 


3 A 


2.4 


1.9 


1.6 


13 




A 479 


1.00 


6.4 


4.7 


3.5 


23 


1.8 


13 


1.0 


TP316L 




1.00 


15.3 


143 


11.2 


8.7 


6.6 


5.1 


3.9 




B 166 


1.00 


6.6 


4.2 


2.0 


1.6 


1.1 


1.0 


0.80 




B 408 


1.00 


7.4 


5.9 


4.7 


3.8 


3.0 


2.4 


IS 






1.00 


13.6 


10.9 


8.8 


7.0 


5.6 


4.5 


3.6 


R30556 


B 572 (A09) 
Forgings 


1.00 


6 A 


4.7 


3.7 


2.9 


23 


1.8 


1.4 


F304H 


A 182 


1.00 


5.2 


4.0 


3.1 


2.4 


IS 


1.6 


13 






1.00 


4.0 


3.0 


2.2 


1.7 


13 


0.97 


0.75 


F310H 




1.00 


7.4 


53 


4 A 


3 A 


23 


1.7 


13 


F316H 




1.00 


6.4 


4.7 


33 


23 


1.8 


13 


1.0 


F316L 





189 



Copyright © 2009 by the American Society of Mechanical Engineers. Xg 

No reproduction may be made of this material without written consent of ASME. ^^ 



ASME B31.1b-2009 



Table A-8 Temperatures 1,200°F and Above (Cont'd) 



Spec. 
No. 



Type or 
Grade 



UNS 

Alloy 

No. 



Temper 



Nominal Composition 



P- 
No. 



Notes 



Specified 


Specified 


Minimum 


Minimum 


Tensile, 


Yield, 


ksi 


ksi 



Forgings (Cont'd) 





A 182 


F321H 


S32109 




18Cr- 


lONi 


-Ti 




8 




75 


30 






F347H 


S34709 




18Cr- 


-lONi 


-Cb 




8 




75 


30 






F348H 


S34809 




18Cr- 


-lONi 


-Cb 




8 




75 


30 




B 564 




N06617 


Annealed 


52Ni- 


-22Cr 


-13Co- 


-9Mo 


43 




95 


35 








N08800 


Annealed 


Ni-Cr 


-Fe 






45 




75 


30 








N08810 


Annealed 


Ni-Cr 


-Fe 






45 




65 


25 




Fittings (Sec 


imless and Welded) 






















A 403 


WP304H 


S30409 




18Cr- 


-8Ni 






8 


(1) 


75 


30 






WP316H 


S31609 




16Cr- 


-12Ni 


-2Mo 




8 


(D 


75 


30 






WP316L 


S31603 




16Cr- 


■12Ni 


-2Mo 




8 


(1) 


70 


25 






WP321H 


S32109 




18Cr- 


-lONi 


-Ti 




8 


CD 


75 


30 






WP347H 


S34709 




18Cr- 


-lONi 


-Cb 




8 


(1) 


75 


30 






WP348H 


S34809 




18Cr- 


-lONi 


-Cb 




8 


CD 


75 


30 


(A09) 


B 366 




R30556 


Annealed 


Ni-Fe 


-Cr- 


Co-Mo- 


-W 


45 


(0(6) 


100 


45 


(A09) 






R30556 


Annealed 


Ni-Fe 


-Cr- 


Co-A/lo- 


-W 


45 


CD (7) 


100 


45 



GENERAL NOTES: 

(a) The tabulated specifications are ANSI/ASTM or ASTM, For ASME Boiler and Pressure Vessel Code applications, see related specifica- 
tions in Section II of the ASME Code. 

(b) The stress values in this Table may be interpolated to determine values for intermediate temperatures. 

(c) The P-Numbers listed in this Table are identical to those adopted by the ASME Boiler and Pressure Vessel Code. Qualification of weld- 
ing procedures, welders, and welding operators is required and shall comply with the ASME Boiler and Pressure Vessel Code, Section 
IX, except as modified by para. 127.5. 

(d) Tensile strengths and allowable stresses shown in "ksi" are "thousands of pounds per square inch." 

(e) The materials listed in this Table shall not be used at design temperatures above those for which allowable stress values are given. 

(f) The tabulated stress values are 5 x E (weld joint efficiency factor) or 5 x F (material quality factor), as applicable. Weld joint effi- 
ciency factors are shown in Table 102.4.3. 

(g) Pressure-temperature ratings of piping components, as published in standards referenced in this Code, may be used for components 
meeting the requirements of those standards. The allowable stress values given in this Table are for use in designing piping compo- 
nents which are not manufactured in accordance with referenced standards. 

(h) All the materials listed are classified as austenitic [see Table 104.1.2(A)]. 

(i) The tabulated stress values that are shown in italics are at temperatures in the range where creep and stress rupture strength govern 
the selection of stresses. 



190 



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No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-8 Temperatures 1,200°F and Above (Cont'd) 



£or 


Maximum 


Allowable Stress Values in Tension, ksi, 


for Metal Temperature 


, °F, Not Exceeding 


Type or 
Grade 


Spec. 
No. 




F 


1,200 


1,250 


1,300 


1,350 


1,400 


1,450 


1,500 




















Forgings (Cont'd) 




1.00 


5.4 


4.1 


3.2 


2,5 


1.9 


1.5 


1.1 


F321H 


A 182 




1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


F347H 






1.00 


7.9 


5.9 


4.4 


3.2 


2,5 


1.8 


13 


F348H 






1.00 


15.3 


14.5 


11.2 


8.7 


6.6 


5.1 


3.9 




B 564 




1.00 


6.6 


4.2 


2.0 


1.6 


1.1 


1.0 


0.80 








1.00 


7.4 


5.9 


4.7 


3.8 


3.0 


2.4 


1.9 






















Fittings (Seamless and Welded) 




1.00 


6.1 


4.7 


3.7 


2.9 


2.3 


1.8 


1.4 


WP304H 


A 403 




1.00 


7.4 


5.5 


4.1 


3.1 


2.3 


1.7 


13 


WP316H 






1.00 


6.4 


4.7 


3.5 


2.5 


1.8 


13 


1.0 


WP316L 






1.00 


5.4 


4.1 


3.2 


2.5 


1.9 


1.5 


1.1 


WP321H 






1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


WP347H 






1.00 


7.9 


5.9 


4.4 


3.2 


2.5 


1.8 


13 


WP348H 






1.00 


13.6 


10.9 


8.8 


7.0 


5.6 


4.5 


3.6 


R30556 


B 366 


(A09) 


0.85 


11.6 


93 


7.5 


6.0 


4.8 


3.8 


3.1 


R30556 




(A09) 



NOTES: 

(1) THIS MATERIAL IS NOT ACCEPTABLE FOR USE ON BOILER EXTERNAL PIPING - SEE FIGS. 100.1.2(A) and (B). 

(2) These allowable stress values shall be used only if the carbon content of the material is 0.04% or higher. 

(3) These allowable stress values tabulated shall be used only if the material is heat treated by heating to a minimum temperature of 
1,900°F and quenching in water or rapidly cooling by other means. 

(4) These allowable stress values shall be used only when the grain size of the material is ASTM No. 6 or coarser. 

(5) These allowable stress values shall be used only when Supplementary Requirement SI per ASTM A 479 has been specified. 
(A09) (6) Seamless. 

(A09) (7) Welded—all filler metal, including consumable insert material, shall comply with the requirements of Section IX of the ASME Boiler and 
Pressure Vessel Code. 



191 



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No reproduction may be made of this material without written consent of ASME. 



ASME B31.1b-2009 



Table A-9 Titanium and Titanium Alloys 

















Specified 


Specified 


















Minimum 


Minimum 


£ 


Spec. 






Nominal 


P- 




Tensile, 


Yield, 


or 


No. 


Grade 


Condition 


Composition 


No. 


Notes 


ksi 


ksi 


F 


Seamless Pipe and Tube 


















B 338 


1 


Annealed 


Ti 




51 


(1) 


35 


25 


1.00 




2 


Annealed 


Ti 




51 


(1) 


50 


40 


1.00 




3 


Annealed 


TI 




52 


(1) 


65 


55 


1.00 




7 


Annealed 


Tl-Pd 




51 


(1) 


50 


40 


1.00 




12 


Annealed 


Ti-Mo- 


-Ni 


52 


(1) 


70 


50 


1.00 


B 861 


1 


Annealed 


Ti 




51 


(1) 


35 


25 


1.00 




2 


Annealed 


Ti 




51 


CD 


50 


40 


1.00 




3 


Annealed 


Ti 




52 


(i) 


65 


55 


1.00 




7 


Annealed 


Ti-Pd 




51 


CD 


50 


40 


1.00 




12 


Annealed 


Ti-Mo- 


-Ni 


52 


(D 


70 


50 


1.00 


Welded Pipe and Tube 


















B 338 


1 


Annealed 


Ti 




51 


(DO) 


35 


25 


0.85 




2 


Annealed 


Ti 




51 


(1)(2) 


50 


40 


0.85 




3 


Annealed 


Ti 




52 


(1)(2) 


65 


55 


0.85 




7 


Annealed 


Ti-Pd 




51 


(1X2) 


50 


40 


0.85 




12 


Annealed 


Ti-Mo- 


-Ni 


52 


(1)(2) 


70 


50 


0.85 


B 862 


1 


Annealed 


Ti 




51 


(1)(2) 


35 


25 


0.85 




2 


Annealed 


Ti 




51 


(1)(2) 


50 


40 


0.85 




3 


Annealed 


Ti 




52 


(1)(2) 


65 


55 


0.85 




7 


Annealed 


Ti-Pd 




51 


(1)(2) 


50 


40 


0.85 




12 


Annealed 


Ti-Mo- 


-Ni 


52 


(0(2) 


70 


50 


0.85 


Plate, Sheet, 


and Strip 


















B 265 


1 


Annealed 


Ti 




51 


(D 


35 


25 


1.00 




2 


Annealed 


Ti 




51 


CD 


50 


40 


1.00 




3 


Annealed 


Ti 




52 


(i) 


65 


55 


1.00 




7 


Annealed 


Ti-Pd 




51 


(D 


50 


40 


1.00 




12 


Annealed 


Ti-Mo- 


-Ni 


52 


(i) 


70 


50 


1.00 


Forgings 




















B 381 


Fl 


Annealed 


Ti 




51 


CD 


35 


25 


1.00 




F2 


Annealed 


Ti 




51 


CD 


50 


40 


1.00 




F3 


Annealed 


Ti 




52 


CD 


65 


55 


1.00 




F7 


Annealed 


Ti-Pd 




51 


CD 


50 


40 


1.00 




F12 


Annealed 


Ti-Mo- 


-Ni 


52 


(l) 


70 


50 


1.00 



192 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of AS'ME. 



ASME B31.1b-2009 



MANDATORY APPENDIX F 
REFERENCED STANDARDS 



(A08) 

(A09) 



Specific editions of standards incorporated in this Code by reference are shown in this issue of Appendix F. It is not practical to refer to 
a specific edition of each standard throughout the Code text, but instead, the specific edition reference dates are shown here. Appendix F 
will be revised at intervals as needed and issued. The names and addresses of the sponsoring organizations are also shown in this issue. 



American National Standard 

Z223.1-1999 

ASCE/SEI Standard 

7-05 

ASTIVl Specifications [Note (1)] 

A 36/A 36M-00a 
A 47/A 47M-99 
A 48-94a^ 
A 53/A 53M-99b 

A 105/A 105M-98 

A 106-99* 1 

A 125-96 

A 126-95* 1 

A 134-96 

A 135-97C 

A 139-00 

A 178/A 178M-95 

A 179/A 179M-90a 

A 181/A 181M-00 

A 182/A 182M-05a 

A 192/A 192M-91 

A 193/A 193M-00a 

A 194 /A 194M-00a 

A 197/A 197M-00 

A 210/A 210M-96 
A 213/A 213M-99a 
A 214/A 214M-96 
A 216/A 216M-93 
A 217/A 217M-99 
A 229/A 229M-99 
A 234/A 234M-00 
A 240/A 240M-04 
A 242/A 242M-00a 
A 249/A 249M-98 
A 254-97 

A 268/A 268M-00a 
A 276-00a 
A 278-93 
A 283/A 283M-00 
A 285/A 285M-90 (R96) 
A 299/A 299M-97 



ASTM Specifications [Note (1)] 
(Cont'd) 

A 307-00 

A312/A 312M-05a 

A 320/A 320M-00b 

A 322-91 (R96) 

A 333/A 333M-99 

A335/A 335M-00 

A 336/A 336M-99 

A 350/A 350M-00b 

A351/A351M-00 

A 354-00a 

A 358/A358M-01 

A 369/A 369M-00 

A 376/A 376M-OOa 

A 377-99 

A 387/A 387M-99 

A 389/A 389M-93 (R98) 

A 395/A 395M-99 

A 403/A 403M-04 
A 409/A 409M-95a 
A 420/A 420M-00a 
A 426-92 (R97) 
A437/A437M-00a 
A 449-00 

A450/A450M-96a 
A 451-93 (R97) 
A 453/A 453M-00 
A 479/A 479M-00 

A515/A 515M-92 (R97) 

A 516/A 516M-90 (R96) el 

A 530/A 530M-99 

A 564/A 564M-99 

A 575-96 

A 576-90b (R00) 

A 587-96 

A 671-96 
A 672-96 
A 691-98 

A 714-99 



ASTM Specifications [Note (1)] 
(Cont'd) 

A 789/A 789M-04a 
A 790/A 790M-04a 

A 815-99 

A 928-98 
A 992-02 

B 26/B 26M-99 

B 32-00 

B 42-98 

B 43-98 

B 61-93 

B 62-93 

B 68-99 

B 68M-99 

B 75-99 

B 88-99 

B 88M-99 

B 108-99 

B 111-98 

B 111M-98 

B 148-97 

B 150-98 

B 150M-95a 

B 151/B 151M-00 

B 161-00 

B 163-98a 

B 165-93 

B 166-04 

B 167-04 

B 168-04 

B 171-04 

B 209-00 

B 210-00 

B 210M-00 

B 221-00 

B 234-00 

B 234M-0O 

B 241/B 241M-00 



217 



Copyright © 2009 by the American Society of Mechanical Engineers. 
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ASME B31.1b-2009 



(07) 

(A08) 

(A09) 



Referenced Standards (Cont'd) 



ASTM Specifications [Note (1)] 
(Cont'd) 

B 247-00 
B 247M-00 
B 251-97 
B 251M-97 
B 265-99 
B 280-99 
B 283-99a 

B 302-00 
B 315-99 
B 338-99 
B 348-00 
B 361-95 
B 366-04D 
B 367-93 (R98) 
B 381-00 

B 407-96 

B 408-96 

B 409-96a 

B 423-99 

B 424-98a 

B 425-99 

B 435-03 

B 443-93 

B 444-94 

B 446-93 

B 462-04 

B 463-99 

B 464-99 

B 466/B 466M-98 

B 467-88 (R97) 

B 468-99 

B 473-96 

B 546-04 

B 547/B 547M-00 

B 564-00a 

B 572-03 

B 584-00 

B 608-95 
B 619-05 
B 622-04a 
B 625-99 
B 626-04 
B 649-95 
B 673-96 
B 674-96 
B 675-02 
B 676-03 
B 677-99 
B 688-96 (R04) 
B 690-02 



ASTM Specifications [Note (1)] 
(Cont'd) 

B 691-95 

B 704-91 
B 705-94 
B 729-00 

B 804-02 
B 828-00 
B 861-00 
B 862-99 

ASTM Standard Test Methods 

D 323-99 
E 94-00 
E 125-63 (R85) 
E 186-91 
E 280-93 
E 446-91 

MSS Standard Practices 

SP-6-96 

SP-9-97 

SP-25-98 

SP-42-90 

SP-43-91 

SP-45-98 

SP-51-91 

5P-53-95 

SP-54-95 

SP-55-96 

SP-58-93 

SP-61-92 

SP-67-95 

SP-68-97 

SP-69-96 

SP-75-98 

SP-79-92 

SP-80-97 

SP-83-01 

SP-88-93 (R01) 

SP-89-98 

SP-93-87 

SP-94-92 

SP-95-00 

SP-97-95 

SP-105-96 

SP-106-03 

AWS Specifications 

A3.0-94 
D10. 10-99 
QC1-88 



API Specification 

5L, 38th Edition, 1990 

ASME Codes & Standards 

Boiler and Pressure Vessel Code, 
2001 Edition, including 
Addenda 

Bl. 1-1989 

B1.13M-2001 

Bl. 20.1-1983 (R01) 

(ANSi/ASME Bl.20.1) 
Bl. 20.3-1976 (R98) 

(ANSi Bl.20.3) 
B16.1-2005 
B16.3-1998 
B16.4-2O05 
B16.5-2003 
B16.9-2001 
B16.10-2000 
B16. 11-2005 
B16.14-1991 
B16. 15-1985 (R94) 

(ANSI/ASME B16.15) 
B16. 18-1984 (R94) 

(ANSI B16.18) 
B16. 20-1998 
B16.21-2005 
B16. 22-2001 (R05) 
B16. 24-2001 
B16. 25-2003 
B16.34-2004 
B16.42-1998 
B16.47-1996 (98A) 
B16.48-2005 
B16.50-2001 

B18.2.1-1996 (99A) 
B18.2.2-1987 (R99) 

(ASME/ANSf B18.2.2) 
B18.2.3.5M-1979 (R01) 
B18.2.3.6M-1979 (R01) 
B18.2.4.6M-1979 (R98) 
B18.21.1-1999 
B18.22M-1981 
B18.22. 1-1965 (R98) 

B31. 3-2002 
B31. 4-2002 
B31. 8-1999 
B36.10M-2004 
B36.19M-2004 

TDP-1-1998 



218 



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ASME B31.1b-2009 



Referenced Standards (Cont'd) 



(A08) 
(A09) 



AWWA and ANSI/AWWA 
Standards 

C110/A21. 10-98 
C111/A21. 11-95 
C115/A21. 15-99 
C150/A21. 50-96 
C151/A21. 51-96 
C153/A21. 53-94 

C200-97 
C207-94 
C208-96 



AWWA and ANSI/AWWA 
Standards (Cont'd) 

C300-97 
C301-99 
C302-95 
C304-99 

C500-93(95a) 

C504-94 

C509-94 

C600-99 
C606-97 



National Fire Codes 

NFPA 54/ANSi Z223.1-Q6 
NFPA 85-04 
NFPA 1963-03 

PFI Standards 

ES-16-94 
ES-24-98 

FCI Standard 

79-1-03 



GENERAL NOTE: The issue date shown immediately following the hyphen after the number of the standard (e.g., Bl, 1-1989, A 36-89, SP-6-96) 

is the effective date of issue (edition) of the standard. B18.2. 2-1987 (R99) designates specification reaffirmed without change in 1999. 

NOTE: 

(1) For boiler external piping material application, see para. 123.2.2. 

Specifications and standards of the following organizations appear in this Appendix: 



AISC American Institute of Steel Construction, Inc. 
One East Wacker Drive 
Chicago, IL 60601-1802 

ANSI American National Standards institute 
25 West 43rd Street 
New York, NY 10036 
Phone: 212 642-4900 

API American Petroleum institute 

1220 L Street, NW 
Washington, DC 20005-4070 
Phone: 202 682-8000 

ASCE American Society of Civil Engineers 
1801 Alexander Bel! Drive 
Reston, VA 20191-4400 
Phone: 800 548-2723 

703 295-6300 (International) 
Fax: 703 295-6222 

ASME The American Society of Mechanical Engineers 
Three Park Avenue 
New York, NY 10016-5990 

ASME Order Department 

22 Law Drive 

Box 2300 

Fairfield, Nj 07007-2300 

Phone; 973 882-1167 

800-THE-ASME (US & Canada) 
Fax: 973 882-1717, 5155 

ASTM American Society for Testing and Materials 
100 Barr Harbor Drive 
P.O. Box C700 

West Conshohocken, PA 19428-2959 
Phone: 610 832-9585 
Fax: 610 832-9555 



AWS American Welding Society 
550 NW Lejeune Road 
Miami, FL 33126 
Phone: 305 443-9353 

AWWA American Water Works Association 
6666 W. Quincy Avenue 
Denver, CO 80235 
Phone: 303 794-7711 

FCI Fluid Controls institute, Inc. 

1300 Sumner Avenue 
Cleveland, OH 44115-2851 
Phone: 216 241-7333 
Fax: 216 241-0105 

MSS Manufacturers Standardization Society of 
the Valve and Fittings Industry, Inc. 
127 Park Street, NE 
Vienna, VA 22180-4602 
Phone: 703 281-6613 

NFPA National Fire Protection Association 
1 Batten/march Park 
Quincy, MA 02169-7471 
Phone: 617 770-3000 
Fax: 617 770-0700 

PFI Pipe Fabrication Institute 

666 Fifth Avenue, No. 325 
New York, NY 10103 
Phone: 514 634-3434 

PPI Plastics Pipe Institute 

1825 Connecticut Avenue, NW 
Suite 680 

Washington, DC 20009 
Phone: 202 462-9607 
Fax: 202 462-9779 



219 



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ASME B31.1b-2009 



SEI Structural Engineering Institute of ASCE 

1801 Alexander Bell Drive 
Reston, VA 20191-4400 
Phone: 800 548-2723 
Fax: 703 295-6361 



219.1 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of ASME. 



INTENTIONALLY LEFT BLANK 



219.2 



Copyright © 2009 by the American Society of Mechanical Engineers. 
No reproduction may be made of this material without written consent of AS'ME. 



ASME B31.1b-2009 



(07) 
(A08) 

(A09) 



MANDATORY APPENDIX G 
NOMENCLATURE 



This Appendix is a compilation of the nomenclature used within this Code. Included are the term definitions 
and units that can be uniformly applied. These terms are also defined at a convenient location within the Code. 
When used elsewhere within the Code, definitions given here shall be understood to apply. 



Units 



References 



Symbol 



Definition 



SI 



U.S. 



Paragraph 



Table/Fig./App. 



Corrosion, erosion, and mechanical allowances 
(including threading, grooving) 



Area available for reinforcement: 
A x in run pipe 



in branch pipe 



^5 

A. 



by deposited metal beyond outside diameter of 
run and branch and for fillet weld attachments 
of rings, pads, and saddles 

by reinforcing ring, pad, or integral reinforcement 



in saddle on right angle connection 

Pressure design area expected at the end of ser- 
vice life 

Required reinforcement area 

Length of miter segment at crotch 
Subscript referring to branch 
Cold-spring factor 



Size of fillet weld for socket welding components 
other than flanges 

Flanged elbow correction factor 



Nominal pipe size 



mm' in. 



104.1. 2(A)[eqs. (3), 

(3A), (4), (4A)] 
104.3. 1(D.2) 
104.3.1(G) 

104.4.1(B) 
104.5.2(B)[eq. (6)] 
104.5.3(A) 



104.3.1(D.2.3) 
104.3. 1(G.6) 

104.3.1(0.2.3) 
104.3.1(6.6) 

104.3.1(D.2.3) 



104.3.1(0.2.3) 
104.3,1(G,6) 

104.3.1(D.2.3) 

104.3.1(D.2) 

104.3.1(D.2.2) 
104.3. 1(G. 5) 

104.3. 3(A&B) 

104.3.KD.2) 

119.10.1[eqs. (9), 
(10)] 



104.3.1(G) 



104.3.1(D) 
104.3.1(G) 

104.3.1(D) 
104.3.1(G) 

104.3.1(D) 



104.3.1(D) 
104.3.1(G) 

104.3.1(D) 

104.3.1(D) 

104.3.1(D) 
104.3.1(G) 

App. D, Table D-l 

104.3.1(D) 



127.4.4(C) 



Table D-l 
Chart D-2 



mm in. 



119.7.KA.3) 



220 



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ASME B31.1b-2009 



INDEX 



acceptable materials 

standards and specifications, 123.1, Table 126.1, 
Appendix F 
access holes, 114.2.2 

air and hydraulic distribution systems, 100.1.2(E) 
alignment, 127.3(C) 
allowable stresses, shear, 102.3.1(B) 
allowable stress values, 102.3.1(A), Appendix A 
aluminum pipe, 124.7(A) 
anchors, 119.7.1(A.3), 120.2.3 
anchors and guides, 120.2.3, 121.7.1 
annealing, definition, 100.2 
ANSI standards, Table 126.1, Appendix F 
API standards, Table 126.1, Appendix F 
arc welding, definition, 100.2 

ASME codes and standards, Table 126.1, Appendix F 
ASME SA and SB specifications, 123.1 
assembly, 135 
assembly, definition, 100.2 
ASTM specifications, Table 126.1, Appendix F 
ASTM standard test methods, Table 126.1, 

Appendix F 
attachments 

design rules, 104.3.4 

structural, 121.8 

structural, definition, 100.2 
attachment welds, 127.4.9 
automatic welding, definition, 100.2 
AWS filler metal specifications, Table 126.1, 

Appendix F 
AWWA standards, Table 126.1, Appendix F 

backing ring, definition, 100.2 
backing rings, 111.2.2, 127.2.2 

acceptable types, 127.2.2(A.l) 

ferrous, 127.2.2(A) 

longitudinal welded joints, 127.2.2(A.3) 

nonferrous and nonmetallic, 127.2.2(B) 
ball joints, 101.7.2, 119.5.1 
base metal, definition, 100.2 
bell end joints, 116 
bending, 102.4.5, 129 

heat treatment, 129.3 
bends, 119.5 

bend thinning allowance, Table 102.4.5 
blanks, pipe, 108.2 

blowdow T n valves for instruments, 122.3.2(B.2) 
blowoff and blowdown piping, 122.1.7, 122.2 
blowoff valves, 122.1.7(C) 
boiler drains, 122.1.5 



boiler external piping, 100.1.2(A), 122.1 

authorized installation, 127.5.3(C) 

carbon or alloy steel, 124.3(C) 

cast iron, 124.4 

ductile (nodular) iron, 124.6 

malleable iron, 124.5 

materials acceptable, 123.1, Table 126.1, Appendix F 

miscellaneous systems, 122.1.6 

specifications Table, 126.1, Appendix F 

standards Table, 126.1, Appendix F 

steel, carbon and alloy, 124.3 
bolting, metric, 108.6 
bolting, piping flange, 108.5, Table 112 
bolting procedure, 135.3 
bolts, 108.5 

engagement, 135.3.4 
bolt studs, 108.5, Table 112 
bonnet joint, valve, 107.5 
branch connections, 127.4.8 

definition, 100.2 

design rules, 104.3.1 

extrusions, 104.3.1(G) 

multiple openings, 104.3.1(0.2.5) 

subject to external pressure, 104.3.1(E) 

weld design, 127.4.8 
brazed joints, 117 
braze welding definition, 100.2 
brazing, 128 

alloy, 117.1 

definition, 100.2 

filler metal, 128.2.1 

flux, 128.2.2 

heating, 128.4.2 

material, 128.2 

preparation, 128.3 

procedure, 128.4 

qualification, 128.5 

records, 128.6 
butt joint, definition, 100.2 
butt welds 

alignment, 111.2.1, 127.3(C) 

end preparation dimensions, 127.3(A.2) 
bypasses, valve, 107.6 
bypass valves, 122.5.2 and 122.5.3 

capacitor discharge welding (CDW), definition, 100.2 
carbon limitations 

welded construction, 124.2(C) 
cast iron limitations, 124.4 
cast iron to steel flanged joints, 135.3.3 



(A09) 



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ASME B31.1b-2009 



central and district heating systems, 100.1.1, 100.1.2(B) 

centrifugally cast pipe, definition, 100.2 

cladding and lining materials, 124.8 

cleaning, welding, 127.3(B) 

cleaning fluid, load, 101.6.3 

cold bending, 129.3.1, 129.3.3(B) 

cold spring, 119.2 

columns, water, 122.1.6(C) 

compression joints, 115 

concavity, girth butt welds, 127.4.2(C5) 

condensing reservoirs, 122.3.2(C) 

connection, equipment, definition, 100.2 

connection branch, definition, 100.2 

constant supports, 121.7.4 

consumable inserts, 127.2.3 

contraction, 101.7 

control piping, 122.3.3 

cooling effect, 101.4,1 

copper pipe, 124.7(A) 

corrosion allowance, 102.4.1 

corrosion control, Appendix IV 

corrosive liquids and gases, 122.9 

corrugated pipe, 119.5 

creep range, 119.3 

curved pipe, 104.2 



dead load, 101.6.2 
defect, definition, 100.2 
definitions, 100.2 
design 

cast iron, 124.4 

criteria, 102 

ductile (nodular) iron, 124.6 

malleable iron, 124.5 

nonferrous metals, 124.7 

nonmetallic pipe, 124.8 

steel, 124.3 
design conditions, 101 
design pressure, 104.1.2(A) 
design temperature, 101.3.2 
desuperheaters, 122.4 
deterioration of materials, 124.10 
discontinuity, definition, 100.2 
dissimilar welds — backing, 127.2.2(A.2) 
district heating systems, 100.1,1, 122.14 
double submerged arc welded pipe, definition, 100,2 
drain piping, 122.1.5(A) 
drains, miniature boilers, valves, 122.1.5(C) 
drains, valve, 122.1.5(B) 
drip lines, 122.11.1 
ductile iron bell end piping, 135.7 
ductile (nodular) iron limitations, 124.6 
ductile iron pipe thickness, 104.12(B) 
ductility, 119.3 
dynamic effects, 101.5 



earthquake loadings, 101.5.3 

elbows, 104.2.2 

electric flash welded pipe, definition, 100.2 

electric fusion welded pipe, definition, 100.2 

electric resistance welded pipe, definition, 100.2 

end preparation, welding, 127.3(A) 

ends, valve, 107.3 

engineering design, definition, 100.2 

entrapped pressure, valve, 107.1(C) 

equipment connection, definition, 100.2 

equivalent full temperature cycle, 102.3.2(C) 

erection, definition, 100.2 

erosion allowance, 102.4.1 

erosion /corrosion, Appendix IV 

examination, 136.3 

general, 136.3.1 

liquid penetrant, 136.4.4 

acceptance standards, 136.4.4(B) 
evaluation of indications, 136.4.4(A) 

magnetic particle, 136.4.3 

acceptance standards, 136.4.3(B) 
evaluation of indications, 136.4.3(A) 

mandatory minimum requirements, Table 136.4 

radiography, 136.4.5 

acceptance standards, 136.4.5(A) 

requirements, 136.4 

visual, 136,4.2 

acceptance standards, 136.4.2(A) 
exhaust piping, 122.12 
expanded joints, 113 
expansion, 119 

joints, 101.7.2 

properties, 119.6 

stress, 102.3.2(C) 
external design pressure, 101.2.4 
extruded pipe, definition, 100.2 
extrusion, 129.2 



fabrication, definition, 100.2 

face of weld, definition, 100.2 

facings, flange, 108.3, 108.5.2, Table 112 

federal specifications, Table 126.1, Appendix F 

feedw 7 ater piping, 122.1.3 

feedwater valves, 122.1.7(B) 

filler metal, 127.2.1 

brazing, 128.2.1 

definition, 100.2 
fillet weld, definition, 100.2 
fillet welds, 111.4 

welding, 127.4.4 
fittings, 115 
fittings and joints for instrument, control, and 

sampling piping, 122.3.6 
fixtures, 121.2 

flammable and toxic gases and liquids, 122.8 
flammable fluids, 117.3(A) 



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ASME B31.1b-2009 



flange, material combinations, Table 112 

flange bolting, pipe, 108.5, Table 112 

flanged elbows, 104.2.2 

flanged joints, 112, 135.2.1 

flange facings, 108.3, 108.5.2, Table 112 

flange gaskets, 108.4, 108.5.2, Table 112 

flanges, pipe, 108.1 

flared joints, 115 

flareless joints, 115 

flattening, 104.2.1(C) 

flaw, definition, 100.2 

flexibility, 119 

factors, 119.7.3, Appendix D 
flexible hose 

metallic, 101.7.2, 106.4, 119.5, 121.7.1(C) 
(A08) nonmetallic, 105.3(D) 

fluid expansion effects, 101.4.2 

flux, brazing, 128.2.2 

forged and bored pipe, definition, 100.2 

formed components, heat treatment, 129.3 

forming, 129.2 

full fillet weld, definition, 100.2 

furnace butt welded pipe, definition, 100.2 

fusion, definition, 100.2 

gage cocks, 122.1.6(C) 
gage glass, 122.1.6 

connections, 122.1.6(A) 
galvanic corrosion, 124.7(B) 
gaskets, pipe flange, 108.4, 108.5.2, Table 112 
gas welding, definition, 100.2 
geothermal systems, 100.1.2(B) 
girth butt welds, 127.4.2 
graphitization, 124.2(A) and (B) 
grinding, girth butt welds, 127.4.2(C4) 
groove weld, definition, 100.2 

hanger adjustments, 121.4 

hangers and supports, definitions, 100.2 

hanger spacing, 121.5 

heat affected zone, definition, 100.2 

heat exchanger piping, design temperature, 101.3.2(B) 

heating, brazing, 128.2.3 

heat treatment 

austenitic stainless steel bends and formed 
components, 129.3.4 

bends, 129.3 

definition, 100.2 

formed components, 129,3 

heating and cooling requirements, 132.6, 132.7 

welds, 127.4.10, 131, 132, Table 132 



impact, 101.5.1 

imperfection, definition, 100.2 

indication, definition, 100.2 



inert gas metal arc welding 

definition, 100.2 
inquiries, Appendix H 
inspection 

instrument, control, and sampling piping, 122.3.9(A) 

requirements, 136.2 
inspection and examination, 136 

general, 136.1.1 

verification of compliance, 136.1.2 
inspectors 

qualification of owner's, 136.1.4 

rights of, 136.1.3 
instrument 

piping, 122.3 

valves, 122.3.2(B) 
integral type, 121.8.2 

internal design pressure, definition, 101.2.2 
internal pressure design, 104.1.2 
interruption of welding, 131.6 
intersections, 104.3 

branch connections, 104.3.1 

design rules, 104.3 

joint, butt, definition, 100.2 

joint, mechanical, definition, 100.2 

joint clearance, brazing, 128.3.2 

joint design, definition, 100.2 

joint efficiency 102.3.2(C) 

joint penetration, definition, 100.2 

joints, valve bonnet, 107.5 

lapping, 129.2 

level indicators, 122.1.6 

limitations on materials, 123.2 

live load, 101.6.1 

loads and supporting structures, 121.4 

local overstrain, 119.3 

local postweld heat treatment, 132.7 

longitudinal welds, 127.4.3 

loops, 119.5 

low energy capacitor discharge welding, 127.4.9(A) 

main line shutoff valves, 122.3.2(A.l) 
malleable iron limitations, 124.5 
manual welding, definition, 100.2 
marking 

materials, products, 123.1(E) 
valve, 107.2 
materials 

general requirements, 1.23 
limitations, 124 
miscellaneous parts, 125 
bolting, 125.4 
gaskets, 125.3 
specifications and standards, 123.1, Table 126.1, 
Appendix F 



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ASME B31.1b-2009 



stresses, 123.1 
maximum allowable internal pressure, 102.2.4 
maximum allowable temperature, 102.2.4 
maximum allowable working pressure, definition, 

100.2 
may, definition, 100.2 
mechanical gland joints, 11.8 
mechanical joint, definition, 100.2 
mechanical strength, 102.4.4 
(A09) miniature electronic boiler, 122.1.4(A.l), 122.1.5(C) 
minimum wall thickness, 104.1.2(A) 
miscellaneous systems, 122.1.6 
miter, definition, 100.2 
miters, 104.3.3 

moduli of elasticity, Appendix C 
modulus of elasticity, 119.6.2, 199.6.4 
MSS standards, Table 126.1, Appendix F 

nomenclature, Appendix G 

nominal wall, 104.1.2(A) 

nonboiler external piping, 100.1.2(A) 

noncyclic service, 119.7(A.3) 

nonferrous material limitations, 123.2.7 

nonferrous pipe and tube, 104.1.2(C3) 

nonintegral type, 121.8.1 

nonmetallic piping materials limitations, 124.9 

normalizing, definitions, 100.2 

normal operating condition, 102.2.3 

nuts, 108.5.1, Table 112 

occasional loads, 102.2,4 
offsets, 119.5 

oil and flammable liquids, 122.7.1 
opera tion qualification 

general, 127.5.1 

responsibility, 127.5.3(B) 
operator, welding, definitions, 100.2 
other rigid types (fixtures), 121.7.2 
outside screw 7 and yoke, valve, 107.4 
ovality, 104.2.1(B) 

overpressurization, Valve, 107.1(C) 
oxygen cutting, definition, 100.2 
oxygen gouging, definition, 100.2 

peening, 100.2 

penetration, root, definition, 100.2 

PFI standards, Table 126.1, Appendix F 

pipe 

attachments, design rules, 104.3.4 

bends, 104.2.1 

blanks, 108.2 

definition, 100.2 

flange bolting, 108.5, Table 108.5.2 

flanges, 108.1 

intersections, design rules, 104.3 

supporting elements, definition, 100.2 



supporting elements, design, 121 
unions, 106.3, 115 
piping joints, 100 
plastic strain, 119.3 
Poisson's ratio, 119.6.3 
postweld heat treatment, 132 
definition, 100.2 

definition of thickness governing PWHT, 132.4 
dissimilar metal welds, 132.2 
exemptions, 132.3 
furnace heating, 132.6 
heating and cooling rates, 132.5 
local heating, 132.7 
mandatory requirements, Table 132 
minimum holding temperature, Table 132 
minimum holding time, Table 132 
preheating, 131 
definition, 100.2 
dissimilar metals, 131.2 
temperature, 131.4 
preparation for welding, 127.3 
pressure 

definition, 100.2 

entrapped liquids, valve, 107.1(C) 
gages, 122.1.6 

reducing valves, 107.1(G), 122.5, 122.14 
relief piping, 122.6 
temperature ratings, 102.2 
waves, 101.5.1 
pressure tests 

general requirements, 137.1 

maximum stress during test, 137.1.4 

personnel protection, 137.1.3 

subassemblies, 137.1.1 

temperature of test medium, 137.1.2 

testing schedule, 137.1.5 
hydrostatic, 137.4 

equipment check, 137.4.4 

material, 137.4.1 

required pressure, 137.4.5 

test medium, 137.4.3 

venting, 137.4.2 
initial service, 137.7 
mass-spectrometer and halide, 137.6 
pneumatic, 137.5 

equipment check, 137.5.3 

general, 137.5.1 

preliminary test, 137.5.4 

required presssure, 137.5.5 

test medium, 137.5.2 
preparation for test, 137.2 

expansion, joints, 137.2.3 

flanged joints containing blanks, 137.2.5 

isolation of piping and equipment, 137.2.4 

joint exposure, 137.2.1 

temporary supports, 137.2.2 



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ASME B31.1b-2009 



test medium expansion, 137.2.6 
retesting, 137.8 
specific piping systems, 137.3 
boiler external piping, 137.3.1 
nonboiler external piping, 137.3.2 
procedures, welding, definitions, 100.2 
proprietary joints, 118 
pump discharge piping, 122.13 
pump suction piping, 122.12 

qualification, brazing, 128.5 
qualification, welding, 127.5 

procedure responsibility, 127.5.3(A) 
responsibility, 127.5.2 

welder and welding operation responsibility, 
127.5.3(B) 
quality control requirements for boiler external piping 
(BEP), App. J 

ratings 

at transitions, 102.2.5 

variation from normal operation, 102.2.4 
records, brazing, 128.6 
records, welding, 127.6 
reducers, 104.6 
reinforcement 

branch connections, 104.3.1(D) 

of weld, definitions, 100.2 

of welds, Table 127.4.2 

zone, 104.3.1(D.2.4) 
relief devices, 122.5.3, 122.14.1 
repair, weld defects, 127.4.11 
restraints, 119.5, 119.7.3 
reversed stress, 119.2 
ring, backing, definition, 100.2 
rolled joints, 113 
rolled pipe, definition, 100.2 
root opening, definitions, 100.2 

safety valves, 107.8, 122.1.7(D), 122.5, 122.14.1 
sampling piping, 122.3.5(C) 
scope, 100.1 
seal weld 

definition, 100.2 

welds, 111.5 

thread joints, 127.4.5, 135.5.2 
seamless pipe, definition, 100.2 
self-springing, 119.2 

semiautomatic arc welding, definition, 100.2 
shall, definition, 100.2 

shielded metal arc welding, definition, 100.2 
shock, 117.3(C) 
should, definition, 100.2 
size of w T eld, definition, 100.2 
slag inclusion, definition, 100.2 



sleeve coupled joints, 118 

snow and ice load, 101.6.1 

socket — type joints, 117 

socket welds, 111.3 

socket welds, assembly, 127.3(E) 

soldering 

definition, 100.2 

filler metal, 128.2.1 

flux, 128.2.2 

flux removal, 128.4.3 

heating, 128.4.2 

material, 128.2 

preparation, 128.3 

procedure, 128.1.2 

soft soldered joints, 117.2, 117.3 

soldered joints, 117 
spacing, welding, 127.3(D) 
special safety provisions — instrument, control, and 

sampling piping, 122.3.7 
specifications, valve, 107.1(A) 
specifications and standards organizations, Table 

126.1, Appendix F 
specific piping systems, design, 122 
springs, 121.6 
stamping, 133 
standards 

acceptable, 123.1, Table 126.1, Appendix F 

valve, 107.1(A) 
standard welding procedure specifications, 127.5.4 
statically cast pipe, definition, 100.2 
steam distribution systems, 122.14 
steam hammer, 101.5.1 
steam jet cooling systems, 100.1.2(D) 
steam piping, 122.1.2 
steam retention, 107.1(D) 
steam stop valves, 122, 1.7(A) 
steam trap piping, 122.11 
steel 

unassigned stress values, 102.3.1(D) 

unknown specification, 102.3.1(C) 
steel casting quality factor, 102.4.6 
steel limitations 

carbon content, 124.3(D) 

graphitization, 124.2(A) and (B) 

welding, 124.3(C) 
stem threads, valve, 107.4 
strain, 119 

concentration, 119.3 

distribution, 119.3 

range, 119.2 
stress, 119.6.4 

analysis, 119.7 

bearing, 121.2(F) 

compressive, 121.2(E) 

concentration, 119.3 

external pressure, 102.3.2(B) 



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ASME B31.1b-2009 



intensification, 119.7.1(D) 
factors, 111.2.1, 119.7.3 

internal pressure, 102.3.2(A) 

limitations on materials, 123.2, Appendix A 

limits, 102.3 

occasional loads, 102.3.3 

longitudinal pressure, 102.3.2(D) 

raisers, 119.3 

range, 102.3.2(C), 119.2 

reduction, 119.2 

relaxation, 119.2 

relieving, definition, 100.2 

shear, 121.2(D) 

tension, 121.2 
structural attachments, 121.8 

definitions, 100.2 
submerged arc welding, definitions, 100.2 
supports, design, 119.5, 121 

instrument, control, and sampling piping, 122.3.8 
surface condition, girth butt welds, 127.4.2(C) 
surface preparation, brazing, 128.3.1 
sway braces, 121.7.5 
swedging, 129.2 
swivel joints, 101.7.2, 119.5 

tack weld, definitions, 100.2 
tack welds, 127.4.1(C) 
take-off connections, 122.3.2 
temperature, 101.3.1 

graphitization, 124.3 

limitations 
cast iron, 124.4 
ductile (nodular) iron, 124.6 
malleable iron, 124.5 
stress values, 124.1 
temporary piping, 122.10 

terminal points, boiler external piping/ 100.1.2(A) 
testing — instrument, control, and sampling piping, 

122.3.9(A) 
test load, 101.6.3 
thermal contraction, 119.1 
thermal expansion, 101.7, 119, Appendix B 

analysis, 119.7.1 

range, 119.6.1 
threaded brass pipe, 104.1. 2(C2) 
threaded connections 

aluminum pipe, 124.7(C) 
threaded copper pipe, 104.1.2(C2) 
threaded joints, 114 

lubricant, 135.5.1 

seal welded, 135.5.2 
threaded piping, 135.5 
threaded steel pipe, 104.1.2(0) 
threading and grooving allowance, 102.4.2 
threads, valve stem, 107.4 
throat of fillet weld, definitions, 100.2 



toe of weld, definitions, 100.2 
toxic fluids, 117.3(A) 
transients 

pressure, 102.2.4 

temperature, 102.2.4 
transitions, local pressure, 102.2.5 
transitions, O.D., 127.4.2(B) 
trap discharge piping, 122,11.2 
treatment, heat, definitions, 100.2 
tungsten electrode, definitions, 100.2 

undercut, definitions, 100.2 
undercuts, girth butt welds, 127.4.2(C3) 
unit expansion, 119.6.1 
upsetting, pipe ends, 129.2 

vacuum, 101.4.1 
valves, 107 

blowoff, 122.1.7(C) 

bonnet joint, 107.5 

bypasses, 107.6 

diaphragm, 107.1(F) 

drains, 107.1(C) 

ends, 107.3 

feedwater, 122.1.7(B) 

and fittings, 122.1.7 

flanged ends, 107.3 

general, 107.1 

marking, 107.2 

miniature boilers, 122.1.7(A.1.B) 

noncomplying designs, 107.1(B) 

pressure regulator, 107.1(G) 

safety, 107.8, 122.1.7(D) 

specifications, 107.1(A) 

standards, 107.1(A) 

steam stop, 122.1.7(A) 

threaded ends, 107.3 

welding ends, 107.3 
variable supports, 121.7.3 
variations from normal operation, 102.2.4 
vibration, 101.5.4, 117.3(C) 

washers, 108.5.1 
water 

columns, 122.1.6 

hammer, 101.5.1 

level indicators, 122.1.6 
weight effects, 101.6 
weld 

concavity, 127.4.2(C5) 

definitions, 100.2 
weld, fillet, definition, 100.2 
weld, seal, definition, 100.2 
weld, tack, definition, 100.2 
weld defect repair, 127.4.11 
welded branch connections, 127.4.8 



(A09) 



(AG8)(A09) 



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ASME B31.1 fNTERPRETATiONS VOLUME 44 



ASME B31.1 
INTERPRETATIONS VOLUME 44 



Replies to Technical Inquiries 
January 1, 2008 Through December 31, 2008 

FOREWORD 

It has been agreed to publish interpretations issued by the B31 Committee concerning B31.1 
as part of the update service to the Code. The interpretations have been assigned numbers in 
chronological order. Each interpretation applies either to the latest Edition or Addenda at the 
time of issuance of the interpretation or the Edition or Addenda stated in the reply. Subsequent 
revisions to the Code may have superseded the reply. 

The replies are taken verbatim from the original letters, except for a few typographical and 
editorial corrections made for the purpose of improved clarity. In some instances, a review of 
the interpretation revealed a need for corrections of a technical nature. In these cases, a revised 
reply bearing the original interpretation number with the suffix R is presented. In the case where 
an interpretation is corrected by errata, the original interpretation number with the suffix E is used. 

ASME procedures provide for reconsideration of these interpretations when or if additional 
information is available which the inquirer believes might affect the interpretation. Further, 
persons aggrieved by an interpretation may appeal to the cognizant ASME committee or subcom- 
mittee. As stated in the Statement of Policy in the Code documents, ASME does not " approve," 
"certify/' "rate/' or "endorse" any item, construction, proprietary device, or activity. 

For the 2007 Edition, interpretations will be issued as necessary up to twice a year until the 
publication of the 2010 Edition. 

The page numbers for the Interpretation supplements included with updates to the 2007 Edition 
start with 1-1 and will continue consecutively through the last update to this Edition. 



1-9 



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ASME B31.1 INTERPRETATIONS VOLUME 44 



B31.1 

Subject Interpretation File No. 

Frame Type Support 44-1 04-14.67 

Para. 102.2.4. 43-7 06-599 

Para. 102.3, Allowable Stresses 44-3 07-753 

Table 132., Postweld. Heat Treatment 44-2 08-26 

Table 136.4, Mandatory Nondestructive Examinations 44-4 08-1062 



1-10 



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ASME B31.1 INTERPRETATIONS VOLUME 44 



Interpretation: 43-7 

Subject: B31. 1-2004, Para. 102.2.4 
Date Issued: March 28, 2007 
File: 06-599 

Question: Do the allowances stated in para. 102.2.4 of the B31.1 Code, 2004 Edition, apply to 
a system (such as a vent of fire suppression system) that is at atmospheric pressure (0 psig) most 
of the time and yet is manufactured for the purpose of being pressurized for short periods of time? 

Reply: No. 

Note: This interpretation was inadvertently omitted from Vol. 43 of the interpretations. 



Interpretation: 44-1 

Subject: B31. 1-2007, Frame Type Support 
Date Issued: January 23, 2008 
File: 04-1467 

Question (1): Does para. 130.2 apply to " frame type'' pipe supports? In other words, shall the 
" frame type" pipe support be welded in accordance with the requirements of para. 127 and the 
welders and welding procedure be qualified in accordance with the requirements of ASME 
Section IX? 

Reply (1): Yes. 

Question (2): If the answer to Question (1) is yes, are "frame type'' pipe supports considered 
as supplementary steel as defined in para. 120.2.4? 

Reply (2): No. 

Question (3): May the welding requirements of ASME Section IX apply to the supplemen- 
tary steel? 

Reply (3): Yes. 



Interpretation: 44-2 

Subject: B31. 1-2004 With Addenda Through 2006, Table 132, Postweld Heat Treatment 
Date Issued: March 10, 2008 
File: 08-26 

Question: In Table 132, for P-No. 4 material, is the condition (d) for an exemption from 
mandatory PWHT met if the throat thickness of the weld is less than or equal to V 2 in. and the 
pipe meets the requirements of conditions (d)(2) and (d)(3) but the fitting or flange does not? 

Reply: Yes. 

141 

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ASME B31.1 INTERPRETATIONS VOLUME 44 



Interpretation: 44-3 

Subject: Paragraph 102.3, Allowable Stresses 
Date Issued: May 1, 2008 
File: 07-753 

Question: May the allowable stresses published in ASME Boiler and Pressure Vessel Code 
Section II, Part D be used for materials for which, allowable stresses are listed in B31.1 Appendix A? 

Reply: No. 



Interpretation: 44-4 

Subject: Table 136.4, Mandatory Nondestructive Examinations 
Date Issued: November 17, 2008 
File: 08-1062 

Question: May mandatory nondestructive examinations per Table 136.4 be exempted if the 
joint design is impractical to examine using the required examination techniques? 

Reply: No. 



1-12 



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ASME B31.1 CASES 



B31.1 - Cases No. 34 



A Case is the official method of handling a reply to an inquiry when study indicates that the 
Code wording needs clarification, or when the reply modifies the existing requirements of the 
Code or grants permission to use new materials or alternative constructions. 

ASME has agreed to publish Cases issued by the B31 Committee concerning B31.1. as part of 
the update service to B31..1. The text of proposed new and revised Cases and reaffirmations of 
current Cases appear on the ASME website at http://cstools.asme.org/csconnect/Committee- 
Pages.cfm for public review. New and revised Cases, as well as announcements of reaffirmed 
Cases and annulments, then appear in the next update. As of the 1992 and later editions, all 
Cases currently in effect at the time of publication of an edition are included with it as an update. 

The ASME B31 Code for Pressure Piping Standards Committee took action to eliminate Code 
Case expiration dates effective September 21, 2007. This means that all Code Cases listed in Cases 
No. 33 and beyond will remain available for use until annulled by the ASME B31 Code for 
Pressure Piping Standards Committee. 

This update, Cases No. 34, which is included after the last page of the 2009 Addenda and the 
Interpretations Volume 44 that follow, contains the following Cases: 

179 183 

The page numbers for the Cases supplements included with updates to the 2007 Edition start 
with C-l and will continue consecutively through the last update to this Edition. The Cases 
affected by this supplement are as follows: 

Page Location Change 

C-27 Case 179 Annulled 

C-28 Case 183 In the Reply, paragraph (d) revised 



C~25 



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ASME B31.1 CASES 



B31 CASE 179 

Use of Ultrasonic Examination in Lieu of Radiography for B31.1 Applications 

in Materials Y 2 in. and Less in Wall Thickness 

Annulment Date: January 22, 2009 
Reason for Annulment: Code Case was incorporated into the Code. 



C-27 



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ASME B31.1 CASES 



B31 CASE 183 
Use of Seamless 9Cr-2W in ASME B31.1 Construction 

Approval Date: April 26, 2007 



Inquiry: May seamless 9Cr-2W tubes, pipes, and forg- 
ings, with the chemical analysis shown in Table 1 and 
minimum mechanical properties as shown in Table 2 
that otherwise conform to the specifications listed in 
Table 3, be used for ASME B31.1 construction? 

Reply: It is the opinion of the Committee that seamless 
9Cr-2W tubes, pipes, and forgings, with the chemical 
analysis shown in Table 1 and minimum mechanical 
properties as shown in Table 2 that otherwise conform 
to the specifications listed in Table 3, may be used for 
ASME B31.1 construction provided the following 
requirements are met: 

(a) The material shall be austenitized within the tem- 
perature range of 1,900°F to 1,975°? (1 040°C to 1 Q80°C), 
followed by air cooling or accelerated cooling, and tem- 
pered within the range of 1,350°F to 1,470°F (730°C to 
800°C). 

(b) The material shall not exceed a Brinell hardness 
number of 250 (Rockwell C 25). 

(c) The maximum allowable stress values for the 
material shall be those given in Table 4. Maximum tem- 
perature of application shall be limited to 1,150°F 
(621 °C), except that tubing used in applications up to 
and including 3V 2 in. (89 mm) outside diameter may be 
used up to 1,200°F (649°C). 

(d) Separate weld procedure qualification shall be 
conducted. For the purpose of performance qualifica- 
tions, the material shall be considered P-No. 5B, Group 



2. The procedure and performance qualifications shall 
be conducted in accordance with Section IX. Postweld 
heat treatment for this material is mandatory, and the 
following rule shall apply: The PWHT requirements 
shall be those given for P-No. 15E, Group 1 materials 
in Table 132. 

(e) Except as provided in paragraph (f), if during the 
manufacturing any portion of the component is heated 
to a temperature greater than 1,470°F (800°C), then the 
component must be reaustenitized and retempered in 
its entirety in accordance with paragraph (a), or that 
portion of the component heated above 1,470°F (800 C C), 
including the heat-affected zone created by the local 
heating, must be replaced, or must be removed, reaus- 
tenitized, and retempered, and then replaced in the com- 
ponent. 

(f) If the allowable stress values to be used are less 
than or equal to those provided in Table 1 A of Section II, 
Part D for Grade 9 (SA-213 T9, SA-353 P9, or equivalent 
product specifications) at the design temperature, then 
the requirements of paragraph (e) may be waived, pro- 
vided that the portion of the component heated to a 
temperature greater than 1,470°F (800°C) is reheat 
treated within the temperature range 1,350°F to 1,425°F 
(730°C to 775°C). 

(g) This Case number shall be shown on the Manufac- 
turer's Data Report. 

(h) This Case number shall be shown in the material 
certification and marking of the material. 



C-28 



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ASME B31.1 CASES 



Table 1 Chemical Requirements 



Table 3 Specifications 



Element 


Composition Limits, % 




Product Form 




Spec. No. 




Carbon 


0.07-0.13 




Forging; 






SA482 




Manganese 


0.30-0.60 




Forged 


pipe 




SA-369 




Phosphorus, max. 


0.020 




Pipe 






SA-335 




Sulfur, max. 


0.010 
0,50 




Tube 






SA-213 




Silicon, max. 














Chromium 


8.50-9.50 














Molybdenum 
Tungsten 


0.30-0.60 
1.50-2.00 


Table 4 


Maximum Allowable Stress Values for 




40 






Tube and Pipe 


\ 




Vanadium 


0.15-0.25 








Maxii 


mum Allowable Stress 


Columbium 


0.04-0.09 
0.030-0.070 


For Metal Temperature 






Values 


, ksi 


Nitrogen 






Forgings, Pipe, 


Aluminum, max. 


0.02 


Not Exceeding, °F 




Tube 




Forged Pipe 


Boron 

Titanium, max. 
Zirconium, max. 


0.001-0.006 
0.01 
0.01 


-20 to 100 
200 
300 
400 




25.7 
25.7 
25.3 
24.5 




25.7 
25.7 
25.3 






24.5 






500 






23.8 




23.8 


Table 2 Mechanical 


Property Requirements 


600 

650 
700 
750 
800 
850 
900 

950 






23.2 

22.8 
22.4 
21.9 
21.4 
20.8 
20.1 

19.2 




23.2 

22.8 
22.4 


Property 


Min. Value 








Tensile strength 90 ksi 
Yield strength 64 ksi 
Elongation in 2 in. [Note (1)] 20% 


21.9 
21.4 
20.8 
20.1 


NOTE: 




19.2 


(1) For longitudinal strip tests, a 


deduction from the basic values 


1,000 






18.3 




18.3 


of 1.00% for each V 3 2-in. decrease in wall thickness below 


1,050 






16.1 




15.7 


5 / 16 in. shall be made. Below 


are the computed minimum elon- 


1,100 






12.3 




12.0 


gation values for each y 32 -in. 


. decrease in wall thickness. 


1,150 






8.9 




8.6 


Where the wall thickness lies 


i between two values shown 


1,200 






5.9 




5.6 



below, the minimum elongation value shall be determined by 
the following equation: 

E = 32t+ 10.0 

where 
E - elongation in 2 in., % 
t — actual thickness of specimen, in. 



GENERAL NOTE: The allowable stress values are based on the 
revised criterion for tensile strength at temperature divided by 3.5, 
where applicable. 







Elongation in 2 in., 


Wall Thickness, 


in. 


min., % 


%6 (0312) 




20.0 


%i (0.281) 




19.0 


% (0.250) 




18.0 


'/ 32 (0.219) 




17.0 


3 / 16 (0.188) 




16.0 


%i (0.156) 




15.0 


% (0.125) 




14.0 


% 2 (0.094) 




13.0 


V 16 (0.062) 




12.0 


0.062 to 0.035, excl. 


11.6 


0.035 to 0.022, excl. 


10.9 


0.022 to 0.015, i 


ncl. 


10.6 



C-29 



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